By default, turn on signal strength update in power save mode.

Adding a resource overlay which decides whether we should disable
signal strength update in power save mode. And the default value
is false. Which means we keep updating signal strength in power
save mode.

Bug: 72463137
Test: manual
Change-Id: I5a5c363e2f2539a97b0b93ee4be37fed63cc69c2
2 files changed