Revert "Disable Maven job support, since it doesn't work."

Let's try getting it to work with the new "android:lint" goal.

This reverts commit 8a3609be9961ec49cc46b4724de2a8796a54e98d.
[FIXED JENKINS-14857] Support the 'lint' goal used by the Android Maven Plugin.

Android Maven Plugin 3.5.1 or newer is required for Lint support.
[FIXED JENKINS-16075] Remove redundant resource path from icon URL.

Apparently the fix for JENKINS-16530 now includes this automatically
for all plugin images, regardless of whether the plugin was already
doing the right thing and allowing caching.