Move lsdump functions from dump_abi.py to extract_lsdump.py

This commit adds extract_lsdump.py and moves lsdump functions. The
module supports only JSON format. It can be imported to dump_abi.py or
run as a standalone script.

Bug: 114163642
Bug: 114164019
Test: ./extract_lsdump.py libgolden_cpp_json.so.lsdump ./sample.dump
Test: ./dump_abi.py libstagefright_bufferqueue_helper.so
Change-Id: Iaa800a7409713ff95ede655787388065f0570566
2 files changed