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
diff --git a/stack/Android.bp b/stack/Android.bp
index 1bedd40..2b5d430 100644
--- a/stack/Android.bp
+++ b/stack/Android.bp
@@ -214,7 +214,7 @@
         "libbtdevice",
         "libbt-hci",
         "libosi",
-        "libbt-protos",
+        "libbt-protos-lite",
     ],
     whole_static_libs: [
         "libbluetooth-for-tests",
@@ -338,7 +338,7 @@
         "libbluetooth-types",
         "libgmock",
         "libosi",
-        "libbt-protos",
+        "libbt-protos-lite",
     ],
     sanitize: {
         cfi: false,