Lint warning fixes

Change-Id: I86ec36c8523f74f301bea3bcbef129a6957a4163
Fix getting commit comments

Previously a commitComment instance was being created
 and then discarded. This also fixes some key names.

Change-Id: Ieac2e05ed345f769109002e1559c455e8feccae8
Don't override the background in comments card

Change-Id: I82851a0f7575349d8fbcd6501749cfc9ea05a8c5