Add a new usage event to UsageStats when a component in a package is
used (content provider binding, explicit broadcast, activity resume)
and it is considered to be important usage.
The follow-up CL will handle the service binding case as it is a little
complicated due to job bindings.
Bug: 175829712
Test: adb shell dumpsys usagestats <package-name>
Test: atest UserUsageStatsServiceTest
Change-Id: I1f2967dcf5999a8f0affea94bce4c0873a04e022
157db238a6