[PTS-Bot]: Added 7 OPP/SR test cases

Added opp.py file
Updated _android.proto and AndroidInternal.kt files
Added AcceptIncomingFile function in AndroidInternal.kt using uiautomator.

Test: atest pts-bot:OPP -v
Bug: 245578454
Ignore-AOSP-First: cherry-pick from AOSP
Change-Id: If2ab94f8033035ddf7b40a1a5acdc58b8f272acc
Merged-In: If2ab94f8033035ddf7b40a1a5acdc58b8f272acc