[pm] forbid deletion of protected packages BUG: 242996180 Test: adb shell pm uninstall --user 0 com.google.android.apps.work.oobconfig Test: Verified with the command above. Before this CL, the package can be deleted. After this CL, the deletion will fail. Change-Id: Iba408e536b340ea5d66ab499442c0c4f828fa36f (cherry picked from commit 15f85c7fa97fe9faa540e6ad9e850990f46a5cca) Merged-In: Iba408e536b340ea5d66ab499442c0c4f828fa36f (cherry picked from commit fcdc62081c934d35a55ff7e511590337cb4e277a) Merged-In: Iba408e536b340ea5d66ab499442c0c4f828fa36f