Metrics: Move bluetooth.proto to one place
* Move bluetooth.proto to proto/ and compile it for both Java LITE
runtime and C++ LITE runtime so that it can be shared between Java
and native code
* Remove redundant comments in bluetooth.proto
Bug:
33693818
Test: make, toggle Bluetooth, clearcut server-client E2E test
adb shell dumpsys bluetooth_manager --proto-bin
ACTS tests: BtMetricsTest, BtFunhausMetricsTest
Change-Id: I7cd5e1b4fb8fcc197272ef8161ff384e53022424
(cherry picked from commit
8948b090088330d4ad12cd550986465228d20965)