Update the file structure of ART Services.

- libartservice/Android.bp: Move to libartservice/service/Android.bp.
  (The api folder is automatically moved along with Android.bp.)
- libartservice/tests: Move to libartservice/service/javatests.
- libartservice/tests/Android.bp: Merge into
  libartservice/service/Android.bp.
- artd/binder/android/os/IArtd.aidl: Move to
  art/binder/com/android/server/art/IArtd.aidl.

Bug: 177273468
Test: atest ArtServiceTests
Ignore-AOSP-first: ART Services.
Change-Id: Ia606787150333d0292a68b01fa139278706a71c4
12 files changed