libaudiohal@aidl: Refactor Android.bp files and reformat tests

Refactor definitions in Android.bp to minimize duplicates.

Enable clang-format for libaudiohal tests.

Bug: 280527932
Test: m
(cherry picked from https://android-review.googlesource.com/q/commit:7d717ec0b42fe25a2b740fcc86d7f68683def7f6)
Merged-In: I5596f39268c3a67298eb13deda89f072b69b6fbb
Change-Id: I5596f39268c3a67298eb13deda89f072b69b6fbb