Add Kokoro job for binder transport (#26783)

1. A new Dockerfile is added
2. Required configurations and scripts are added

tools/dockerfile/test/binder_transport_apk/Dockerfile

@@ -0,0 +1,75 @@
+# Copyright 2021 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Pinned version of the base image is used to avoid regressions caused
+# by rebuilding of this docker image. To see available versions, you can run
+# "gcloud container images list-tags gcr.io/oss-fuzz-base/base-builder"
+# TODO(jtattermusch): with the latest version we'd get clang12+
+# which makes our build fail due to new warnings being treated
+# as errors.
+FROM gcr.io/oss-fuzz-base/base-builder@sha256:de220fd2433cd53bd06b215770dcd14a5e74632e0215acea7401fee8cafb18da
+
+# This Dockerfile creates the environment for compiling and e2e testing of Android binder transport implementation
+
+# Install basic packages and Bazel dependencies.
+RUN apt-get update && apt-get install -y software-properties-common python-software-properties
+RUN add-apt-repository ppa:webupd8team/java
+RUN apt-get update && apt-get -y install \
+  autoconf \
+  build-essential \
+  curl \
+  wget \
+  libtool \
+  make \
+  openjdk-8-jdk \
+  vim
+
+#========================
+# Android SDK/NDK installation
+ENV SDK_ROOT=/opt/android-sdk
+RUN mkdir -p ${SDK_ROOT}
+RUN wget -O cmd.zip dl.google.com/android/repository/commandlinetools-linux-7302050_latest.zip && \
+    unzip cmd.zip && \
+    yes | ./cmdline-tools/bin/sdkmanager --sdk_root=${SDK_ROOT} 'tools' && \
+    yes | ./cmdline-tools/bin/sdkmanager --sdk_root=${SDK_ROOT} 'platform-tools' && \
+    yes | ./cmdline-tools/bin/sdkmanager --sdk_root=${SDK_ROOT} 'build-tools;30.0.3' && \
+    yes | ./cmdline-tools/bin/sdkmanager --sdk_root=${SDK_ROOT} 'platforms;android-29' && \
+    yes | ./cmdline-tools/bin/sdkmanager --sdk_root=${SDK_ROOT} 'ndk-bundle' && \
+    yes | ./cmdline-tools/bin/sdkmanager --sdk_root=${SDK_ROOT} 'ndk;21.4.7075529'
+
+RUN rm cmd.zip
+
+# Set environment variables for Bazel rules
+ENV ANDROID_HOME=/opt/android-sdk
+ENV ANDROID_NDK_HOME=/opt/android-sdk/ndk/21.4.7075529
+
+#========================
+# Bazel installation
+
+# Must be in sync with tools/bazel
+ENV BAZEL_VERSION 3.7.1
+
+# The correct bazel version is already preinstalled, no need to use //tools/bazel wrapper.
+ENV DISABLE_BAZEL_WRAPPER 1
+
+RUN apt-get update && apt-get install -y wget && apt-get clean
+RUN wget "https://github.com/bazelbuild/bazel/releases/download/$BAZEL_VERSION/bazel-$BAZEL_VERSION-installer-linux-x86_64.sh" && \
+  bash ./bazel-$BAZEL_VERSION-installer-linux-x86_64.sh && \
+  rm bazel-$BAZEL_VERSION-installer-linux-x86_64.sh
+
+
+RUN mkdir -p /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]

tools/internal_ci/linux/grpc_binder_transport_apk.cfg

@@ -0,0 +1,23 @@
+# Copyright 2021 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_binder_transport_apk.sh"
+timeout_mins: 60
+env_vars {
+  key: "BAZEL_SCRIPT"
+  value: "tools/internal_ci/linux/grpc_binder_transport_apk_build_in_docker.sh"
+}

tools/internal_ci/linux/grpc_binder_transport_apk.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Copyright 2021 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -ex
+
+# change to grpc repo root
+cd $(dirname $0)/../../..
+
+source tools/internal_ci/helper_scripts/prepare_build_linux_rc
+
+export DOCKERFILE_DIR=tools/dockerfile/test/binder_transport_apk
+export DOCKER_RUN_SCRIPT=$BAZEL_SCRIPT
+exec tools/run_tests/dockerize/build_and_run_docker.sh

tools/internal_ci/linux/grpc_binder_transport_apk_build_in_docker.sh

@@ -0,0 +1,33 @@
+# Copyright 2021 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#!/usr/bin/env bash
+#
+# NOTE: No empty lines should appear in this file before igncr is set!
+set -ex -o igncr || set -ex
+
+mkdir -p /var/local/git
+git clone /var/local/jenkins/grpc /var/local/git/grpc
+(cd /var/local/jenkins/grpc/ && git submodule foreach 'cd /var/local/git/grpc \
+&& git submodule update --init --reference /var/local/jenkins/grpc/${name} \
+${name}')
+cd /var/local/git/grpc
+
+echo $ANDROID_HOME
+echo $ANDROID_NDK_HOME
+
+# Build all basic targets using the strict warning option which leverages the
+# clang compiler to check if sources can pass a set of warning options.
+bazel build --define=use_strict_warning=true \
+  //examples/android/binder/java/io/grpc/binder/cpp/example:app