Uiautomator1 has been deprecated, therefore the uiautomation base classes have
been upgraded to use uiautomator2 and the new gradle build system.
Altered to retrieve `package_name` rather than `package` as per the previous commit.
When moving to Uiautomation 2, tests are now complied into apk files rather than
jar files. To avoid conflicts with regular workload apks a new resource type is
added to retrieve the test files which will be renamed to have the extension
.uiautoapk
- Check the APK's versionName property against the workload's
expected version if specified
- If workload specifies check_abi param, try to get APK from
ABI-specific path on the host
- Add variant_name param to APK resource-getter for backwards
compatibility of dex2oat and peacekeeper
