Update abseil to the latest

bazel/grpc_deps.bzl

@@ -195,9 +195,9 @@ def grpc_deps():
     if "com_google_absl" not in native.existing_rules():
         http_archive(
             name = "com_google_absl",
-            sha256 = "939e50c2fbcbd6f1124023350ef9bd5310d413227faf0e11de2a366dcc4e1e48",
+            sha256 = "979e3a5ff3f8ca417bc4350ebeadd7736c8e9f8ed5ac3d2c524074926c99ea44",
-            strip_prefix = "abseil-cpp-a2e6adecc294dc4cd98cc285a9134ce58e0f2ad0",
+            strip_prefix = "abseil-cpp-44427702614d7b86b064ba06a390f5eb2f85dbf6",
-            url = "https://github.com/abseil/abseil-cpp/archive/a2e6adecc294dc4cd98cc285a9134ce58e0f2ad0.tar.gz",
+            url = "https://github.com/abseil/abseil-cpp/archive/44427702614d7b86b064ba06a390f5eb2f85dbf6.tar.gz",
         )
 
     if "bazel_toolchains" not in native.existing_rules():

third_party/abseil-cpp

@@ -1 +1 @@
-Subproject commit a2e6adecc294dc4cd98cc285a9134ce58e0f2ad0
+Subproject commit 44427702614d7b86b064ba06a390f5eb2f85dbf6

tools/run_tests/sanity/check_submodules.sh

@@ -26,7 +26,7 @@ want_submodules=$(mktemp /tmp/submXXXXXX)
 
 git submodule | awk '{ print $1 }' | sort > "$submodules"
 cat << EOF | awk '{ print $1 }' | sort > "$want_submodules"
- a2e6adecc294dc4cd98cc285a9134ce58e0f2ad0 third_party/abseil-cpp (heads/master)
+ 44427702614d7b86b064ba06a390f5eb2f85dbf6 third_party/abseil-cpp (heads/master)
  090faecb454fbd6e6e17a75ef8146acb037118d4 third_party/benchmark (v1.5.0)
  73594cde8c9a52a102c4341c244c833aa61b9c06 third_party/bloaty (remotes/origin/wide-14-g73594cd)
  1c2769383f027befac5b75b6cedd25daf3bf4dcf third_party/boringssl-with-bazel (remotes/origin/master-with-bazel)