Camera: Add metrics logging for FPS range

- Get new most common FPS values from camera service
- Log them as appropriate
- Add shell command handling to CameraServiceProxy
  - Implement dump_events command to allow metrics events to be
    more easily debugged:
      > adb shell cmd media.camera.proxy dump_events
      Camera usage events dumped: 3
      >

Bug: 324485285
Test: Camera CTS, verifying logging of events occurs as expected
Change-Id: Id74730120c655cd53c18fde71d87c2910b6fd797