Always drop deps from android_library with no srcs

android_library does not accept deps when there are no srcs because
there is no compilation happening. The libs of android_library module
are unnecessary as deps on the android_library since they aren't
being propagated to any dependencies.
So we can drop deps here.

Test: the updated test case and CI

Bug: 302290600

Change-Id: Ib43a1c273a5f3b3e0aa6f29f4e8569ad3487e451