Fix descriptor to access type via getType() s.t. messages using delimited encoding are consistently treated as groups for Java lite.

This should fix InvalidWireTypeException in the case of getLiteType() not treating messages with delimited encoding as groups: http://shortn/_2TEPuwIj6P

getJavaType() and needsUtf8Check() changes are no-ops since the type is the same regardless, but these are updated for consistency.

PiperOrigin-RevId: 612972996

java/core/src/main/java/com/google/protobuf/Descriptors.java

@@ -1267,7 +1267,7 @@ public final class Descriptors {
      * FieldDescriptorProto.Type} maps to exactly one Java type.
      */
     public JavaType getJavaType() {
-      return type.getJavaType();
+      return getType().getJavaType();
     }
 
     /** For internal use only. */
@@ -1298,12 +1298,12 @@ public final class Descriptors {
     /** For internal use only. */
     @Override
     public WireFormat.FieldType getLiteType() {
-      return table[type.ordinal()];
+      return table[getType().ordinal()];
     }
 
     /** For internal use only. */
     public boolean needsUtf8Check() {
-      if (type != Type.STRING) {
+      if (getType() != Type.STRING) {
         return false;
       }
       if (getContainingType().toProto().getOptions().getMapEntry()) {