Change the license detection logic to return if a dual-license was
found. Update the metadata comment as discussed in b/179902335.
Add unit tests for add_module_license and decide_license_type.
Bug: 179902335
Test: atest --host add3prf_test; manually run add3prf.py in {ahash,
libloading, parking_lot, ring}
Change-Id: I3184b5cf0955d124170b9e5987308507bdef6e9a
* Handle lower case file names like LICENSE-Apache.
* Use "license" key value in Cargo.toml if LICENSE-* files are missing.
* Recognize license type: ISC
* Improve readability of a sequence of if-statements.
Bug: 170254513
Test: get_rust_pkg.py --add3prf time-macros-impl
Test: run add3prf.py in current rust/crates/* projects
Change-Id: I9642f52090b20922302513a94fa97d41277f9762
* add3prf.py can be called in existing rust package directories
to normalize METADATA, OWNERS, and other LICENSE* files.
* Add option in get_rust_pkg.py to call add3prt.py and add
required files for 3rd party reviews.
Bug: 170254513
Test: call add3prf.py in external/rust/crates/*
Test: get_rust_pkg.py --add3prf quote remain paste
Change-Id: I70ed5942847716af2ca740a91e7ecde50543b7a0
