Misc GAR fixes

- Use colorPrimary for EntityHeader background.
- Update data usage header text to be 87% black.

Change-Id: Ic361155d7cd36a2f1cca96e918af0e3855fb8ced
Merged-In: Ic361155d7cd36a2f1cca96e918af0e3855fb8ced
Fixes: 79773433
Test: robotests
Test: visual
7 files changed