Build metrics_dump tool in Android.

Replace Makefile with Android.bp.
Remove duplication of protos in proto directory.

Since we are now building the metrics_dump tool
under Android, use frameworks metrics.proto
directly. Also, reference cdm's wv_metrics.proto
from the cdm directory instead of creating a
subset in proto directory.

bug: 161783052
bug: 170607430

Test: build
  m -j128 metrics_dump
Test: metrics_dump [bugreport from adt-3-r.zip]
Test: metrics_dump [bugreport from sabrina-q.gz]
Test: metrics_dump --widevine [adb shell dumpsys media.metrics output]
Change-Id: I82c7e723453ac2a6335cb2bb732a376d535b9ea3

libwvdrmengine/tools/metrics_dump/Android.bp

@@ -0,0 +1,54 @@
+// 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.
+
+cc_binary_host {
+    name: "metrics_dump",
+    proprietary: true,
+    vendor: true,
+
+    cflags: [
+        "-g",
+        "-Wall",
+
+        // Suppress unused parameter error. This error occurs
+        // when using the map type in a proto definition.
+        "-Wno-unused-parameter",
+    ],
+
+    local_include_dirs: ["include"],
+
+    include_dirs: [
+        "frameworks/av/drm/libmediadrm/protos",
+        "vendor/widevine/libwvdrmengine/cdm/core/include",
+        "vendor/widevine/libwvdrmengine/cdm/core/test",
+        "vendor/widevine/libwvdrmengine/cdm/metrics/include",
+        "vendor/widevine/libwvdrmengine/include_hidl",
+        "vendor/widevine/libwvdrmengine/oemcrypto/include",
+        "vendor/widevine/libwvdrmengine/tools/metrics_dump/include",
+    ],
+
+    shared_libs: [
+        "libcdm_metrics_protos_full_host",
+        "libdrm_metrics_protos_full_host",
+        "libprotobuf-cpp-full",
+    ],
+
+    srcs: [
+        "src/base64decode.cpp",
+        "src/mediadrm_metrics.cpp",
+        "src/metrics_dump.cpp",
+        "src/parse_metrics.cpp",
+        "src/wv_metrics.cpp",
+    ],
+}