For zip files, try to open the file in the current directory and
insert the files as mappings. This enables the script to pick up
embedded .so files.
Added a check to look in current directory before the symbol dir.
Added --app-symbols option to specify the directory containing the
app APK and so files.
Test: manual
Bug: 111268230
Change-Id: Id1b1f13bac78911daa6a72c35ebfadfdc9c1700f