Add target SDK versions to BAL metric

The target SDK version is important to determine which set of rules
applies to an app involved in an activity start.

Flag: EXEMPT bugfix (adding missing fields to metric)
Bug: 339245692
Test: atest BackgroundActivityLaunchTest
Change-Id: I97d0c06250e33c32356bcedb565aad3651a3fe8d
1 file changed