Separate out mediaplayer2 code from framework

"media2.jar" is renamed to "updatable-media.jar" in order to
show its purpose clearly.

Test: build & boot & MediaPlayer2Test
Bug: 112766913
Change-Id: Ia2ea05e0ed1a8bb2cfea20c9e2585e3d3cbfffd9
diff --git a/Android.bp b/Android.bp
index 54b6619..2e0f196 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1255,6 +1255,7 @@
         ":non_openjdk_javadoc_files",
         ":android_icu4j_src_files_for_docs",
         ":conscrypt_public_api_files",
+        ":media2-srcs",
         "test-mock/src/**/*.java",
         "test-runner/src/**/*.java",
     ],
@@ -1316,6 +1317,7 @@
         ":non_openjdk_javadoc_files",
         ":android_icu4j_src_files_for_docs",
         ":conscrypt_public_api_files",
+        ":media2-srcs",
     ],
     srcs_lib: "framework",
     srcs_lib_whitelist_dirs: frameworks_base_subdirs,