Fix A2DP Metrics Logging Capacity

* Set the maximum number of wake events logged to 1000
* Stop logging wake log name as it takes too much memory
* Add counters for each of the repeated values in BluetoothLog so that
  the true number of events can be determined while oldest event get
  dropped
* Log Bluetooth session disconnect reasons using enum instead of string
  in order to save memory usage
* Apply changes to bluetooth.proto in ag/1460462 on system/bt

Bug: 33694310
Test: Code compilation and unit tests
Change-Id: I2cc6f9304725938b63b211d615eb1941eac60edf