Add OpenCensus build modules required for gRPC am: 9bc011a365 am: 1b51202d67 am: 32c8db9f77

Change-Id: I90b8d7abdb7974ad5d9e5a0a8aa81df2155d6b8c
diff --git a/api/Android.bp b/api/Android.bp
new file mode 100644
index 0000000..003a4de
--- /dev/null
+++ b/api/Android.bp
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// 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.
+//
+//
+
+java_library_host {
+    name: "opencensus-java-api",
+    srcs: [
+        "src/main/java/**/*.java",
+    ],
+    plugins: [
+        "dagger2-auto-value",
+    ],
+    libs: [
+        "error_prone_annotations",
+        "dagger2-auto-value",
+        "grpc-java-context",
+        "jsr305",
+    ],
+}
diff --git a/contrib/grpc_metrics/Android.bp b/contrib/grpc_metrics/Android.bp
new file mode 100644
index 0000000..9d04518
--- /dev/null
+++ b/contrib/grpc_metrics/Android.bp
@@ -0,0 +1,26 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// 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.
+//
+//
+
+java_library_host {
+    name: "opencensus-java-contrib-grpc-metrics",
+    srcs: [
+        "src/main/java/**/*.java",
+    ],
+    libs: [
+        "opencensus-java-api",
+        "guava",
+    ],
+}