Find license from parent on OSS License Plugin.

[ganadist]

Describe the bug

To Reproduce
Steps to reproduce the behavior:

$ git clone https://github.com/ganadist/minimal-reproducible-example -b oss-license
$ cd minimal-reproducible-example
$ ./gradlew :app:assembleProductionRelease
$ adb install -r app/build/outputs/apk/production/release/app-production-release.apk

Expected behavior
CommonMark license should be shown on license activity

Desktop (please complete the following information):

• Gradle version: Any
• Android Studio version: Any
• Plugin name and version : OSS Licenses 0.10.6

Additional context
On https://maven.apache.org/pom.html#inheritance , licenses item can be inherited from parent.
But, oss-licenses-plugin don't look up licenses item from parent.
X-posted this issue on commonmark/commonmark-java#347

[timothyfroehlich]

Acknowledging that this is an old ticket, but would you (or anyone else affected) be willing to send a PR with a fix? Ideally with an integration test.