The object in this prebuilt directory can be built from
	platform/frameworks/base
From commit 239b0de6733e4665b8d65b7c2b9083c4dc0de7df.
First AOSP build containing the change is aosp-master@5162368.

Note: Before dropping the platformprotos-prebuilt.jar, please
run the following command to strip the jar manifest file,
which causes hidden dependency on jars in the Class-Path.
$ zip -d platformprotos-prebuilt.jar META-INF/MANIFEST.MF