cargo2android: Improve package version logic

If there are multiple packages present in the workspace, attempt
to determine what the current package is by checking the emitted
crate_name value against the package name. If this still fails, a new
`--no-pkg-vers` flag is added to skip this behavior.

Bug: 196803495
Test: New logic finds package if package.name is used for crate_name
Test: New flag prevents emitting the pkg version.
Change-Id: I152e94a0520f09f37622a6cec340ae35842d56ea
1 file changed