Bugfixes for proto_library (proto.include_dirs)

The fixes are
- Dedupe the dir list. Since we partition the proto srcs per pacakge and
  then iterate the map, a single include directory was being listed
  multiple times
- Drop target_compatible_with from these proto_library targets. The
  compatibility will be enforced at the top-level <lang>_proto_library.

Test: Added a unit test

Change-Id: Ia18c0f8c495585010fd4e372092afe80c5d8290c

android/proto.go

@@ -330,7 +330,8 @@ func Bp2buildProtoProperties(ctx Bp2buildMutatorContext, m *ModuleBase, srcs baz
 				Label: l,
 			})
 		}
-		protoLibrariesInIncludeDir := createProtoLibraryTargetsForIncludeDirs(ctx, protoIncludeDirs)
+		// Partitioning by packages can create dupes of protoIncludeDirs, so dedupe it first.
+		protoLibrariesInIncludeDir := createProtoLibraryTargetsForIncludeDirs(ctx, SortedUniqueStrings(protoIncludeDirs))
 		transitiveProtoLibraries.Append(protoLibrariesInIncludeDir)
 	}
 
@@ -401,7 +402,13 @@ func createProtoLibraryTargetsForIncludeDirs(ctx Bp2buildMutatorContext, include
 			if rel != "." {
 				attrs.Import_prefix = proptools.StringPtr(rel)
 			}
-			ctx.CreateBazelTargetModule(
+
+			// If a specific directory is listed in proto.include_dirs of two separate modules (one host-specific and another device-specific),
+			// we do not want to create the proto_library with target_compatible_with of the first visited of these two modules
+			// As a workarounds, delete `target_compatible_with`
+			alwaysEnabled := bazel.BoolAttribute{}
+			alwaysEnabled.Value = proptools.BoolPtr(true)
+			ctx.CreateBazelTargetModuleWithRestrictions(
 				bazel.BazelTargetModuleProperties{Rule_class: "proto_library"},
 				CommonAttributes{
 					Name: label,
@@ -411,6 +418,7 @@ func createProtoLibraryTargetsForIncludeDirs(ctx Bp2buildMutatorContext, include
 					Tags: bazel.MakeStringListAttribute([]string{"manual"}),
 				},
 				&attrs,
+				alwaysEnabled,
 			)
 		}
 	}