Clean up proguard.flags.

We don't use reflection anymore. Let proguard figure out these
details.

Use proguard_common.flags from AOSP.

Bug: 257631899
Test: presubmits
Change-Id: I10b54e06f42ed84fdc5a9343c01d0b45364ae21c
Merged-In: I10b54e06f42ed84fdc5a9343c01d0b45364ae21c
1 file changed
tree: 7ec7620cc3cfa02847a7af761c02957bee5384bb
  1. res/
  2. src/
  3. .gitignore
  4. Android.bp
  5. AndroidManifest.xml
  6. OWNERS
  7. proguard.flags