Require 'message' field in @Discouraged

This change removes the empty string default from the @Discouraged
annotation so that an explanation for why an API is discouraged must be
provided.

Bug: 199202496
Test: Built and flashed successfully
Change-Id: I1ce02d6887c710aafa106837a26270b114ffcf60
1 file changed
tree: 6b06f312a0f81b26e78c52e04ba2d260f1673352
  1. build/
  2. java/
  3. javatests/
  4. tools/
  5. Android.bp
  6. OWNERS
  7. PREUPLOAD.cfg
  8. TEST_MAPPING