hostsidetests/theme: add R assets, copied from Q.

Bug: 128934651
Test: treehugger
Change-Id: I1a771d063e3b22acb0dadf9fce38e4cb5de5ff28
Merged-In: I1a771d063e3b22acb0dadf9fce38e4cb5de5ff28
16 files changed