Add location op apps to "Recent app use" UI

- Rename the title as "Microphone, Camera & Location" (from "Microphone
  & Camera)
- Exclude the system apps and background apps for Location Op usage

Bug: 419834493
Test: on device
Flag: android.location.flags.location_indicators_enabled
Change-Id: I9a16993da8289542597adbe29963d13d201c8093