Fixes for Linux build

Some fixes needed to build on Linux:
* Add missing C++ source files to BUILD.gn
* Add stubs in common/metrics_linux.cc
* Add Linux stub implementation of ActivityAttribution
* Add Linux stub for ParameterProvider::SnoozLogFilePath
* Add missing include files

Bug: 184975659
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I37e6c3f593a95777c9c72bc9cda3da1e7ba466c0