Remove unused import statements

Also added preupload hooks to prevent this in the future.

Bug: 169712334
Test: Compiling
Change-Id: Ieaa6914306cd706fce091020bbb48769551e4550
2 files changed
tree: 9acd65978685a7d1bca52caf6ed56a770c7b0b48
  1. res/
  2. src/
  3. Android.bp
  4. AndroidManifest.xml
  5. OWNERS
  6. PREUPLOAD.cfg