Don't add dexpreopt compat deps to android_library modules

android_library modules are only dexpreopted when built into an app,
and the app will already get the dexpreopt compat dependencies itself.
Adding the compat dependencies to android_library modules causes
circular dependencies when the android_library is used to build
part of the framework, which is then used to build the compat libraries,
which is added as a dependency to the andorid_library.

Test: TestUsesLibraries
Change-Id: I3aca780858c7e5f19d270bcbbe18e6cff8616b43