Pass compiled metalava stub classes through metalava again

Use metalava --rewrite-annotations to pass the compiled sdk stub
class files through metalava again to make the annotations package
private.

Bug: 110532131
Test: m out/target/common/obj/JAVA_LIBRARIES/metalava_android_stubs_current_intermediates/classes.jar
Change-Id: I124e8d89075ec682e9fc3602ef232492bed849aa
Merged-In: I5180bc18979415cec6255beb3fe2c48ec298d3ae