Add Cause metric to RKPD timing atom.

This change would let us filter out the timings correctly based on the
cause of Remote Key Provisioning attempt.

Bug: 315502915
Test: TH
Change-Id: I2d0b5fce81138f67040b0615f6a997e1eca35aa4
1 file changed
tree: 0a153022a125fe46bd6c92d61ae2387ee2ee2019
  1. stats/
  2. OWNERS