Refactor MediaCodecBridge to add support for NDK APIs

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 1c2a73f5e9e9ce376a2944e575f5dd500c149403..1df7b7da257f90d0c19491b9482e63b06eae9e30 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -396,6 +396,15 @@ component("media") {
       "//media/base/android:video_capture_jni_headers",
     ]
 
+    # Only 64 bit builds are using android-21 NDK library, check common.gypi
+    if (current_cpu == "arm64" || current_cpu == "x64" ||
+        current_cpu == "mips64el") {
+      sources += [
+        "base/android/ndk_media_codec_bridge.cc",
+        "base/android/ndk_media_codec_bridge.h",
+        "base/android/ndk_media_codec_wrapper.cc",
+      ]
+    }
     allow_circular_includes_from = [ "//media/base/android" ]
   }