Move inserted method after end of try block

Methods inserted at the end of a synchronized {} block also need to
be outside of the implicit try{} block.  Make sure the next
instruction is the virtual end label for the try block, and put
the inserted method after the label.

Bug: 64301866
Test: locked_region_code_injection test
Test: m -j checkbuild
Change-Id: I6626aa45580b4df692e02fc6127a2947a6075e2e