Updated StatsdStatsReport listener

- improved the way how matcher_stats summary metric is collected
- improved the way how alert_stats summary metric is collected

Bug: 211795373
Bug: 222455192
Test: atest CollectorsHelperTest:com.android.helpers.StatsdStatsHelperTest
Change-Id: If294658eeb0bd4a0291153b3892989bc04f1deb8
2 files changed
tree: 5f74e95e2ad643cdf808475816ca5b0cce6e0fcc
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg