Include annotations in metalava stubs

Pass --include-annotation-classes tools/metalava/stub-annotations
to metalava so that the stubs end up in the final jar.  They will be
post-processed with metalava --rewrite-annotations to avoid affecting
the public SDK.

Bug: 110532131
Test: m out/target/common/obj/JAVA_LIBRARIES/metalava_android_stubs_current_intermediates/classes.jar
Change-Id: Icb9268a72aa7de82ed6ad88aef9ac813796f9bf9
Merged-In: I116643925a3a9594e8590c3714e93d0fb0ac372f