Follow API council suggest to modify API for SelfTargeting

Accept the suggestions from API council
* OverlayManager.commit instead of OverlayManagerTrasnaction.commit
* By using factory method rather than constructor
  * OverlayManagerTrasnaction.newInstance for SelfTargeting.
  * get an OverlayManagerTrasnaction instance without OverlayManager
  * Limit the impact range only in the caller app.

Fix: 265814842
Bug: 269197647
API-Coverage-Bug: 262232910
Test: make update-api ; make
Test: make online-sdk-docs offline-sdk-docs
Test: atest \
    OverlayHostTests \
    OverlayDeviceTests \
    SelfTargetingOverlayDeviceTests \
    OverlayRemountedTest \
    FrameworksServicesTests:com.android.server.om \
    CtsContentTestCases:android.content.om.cts \
    CtsContentTestCases:android.content.res.loader.cts \
    idmap2_tests # result is http://ab/I42700010129841043

Change-Id: I7e81cb3209e78c7fb8ea7ea2072ec88f33053570