App anomaly tips on PowerUsage App list

Screenshots:
[in bg - banner] https://screenshot.googleplex.com/MzLC6LfX93TkkYf
[in bg - hints] https://screenshot.googleplex.com/9JLXNsRiVG8arAU
[in fg - banner] https://screenshot.googleplex.com/9oYbwUkeeLbQX2t
[in fg - hints] https://screenshot.googleplex.com/53DTTUCUnf8rsoE
[apps anomaly highlight hint + settings anomaly banner]
https://screenshot.googleplex.com/8NdS2VMrSzwv2DM

Bug: 291689643
Bug: 291689623
Bug: 284893240
Test: manual
Change-Id: Ic02db49cb3794ef134759d9dcec5f5ef32454a95
Merged-In: Ic02db49cb3794ef134759d9dcec5f5ef32454a95
Merged-In: I7015cdf5a96d518febb160934d780ae84fe14427