Merge "Simplify doclava build.gradle" am: aee2105a3f am: 613c45cab4 am: 75fef46c05

Original change: https://android-review.googlesource.com/c/platform/external/doclava/+/1445755

Change-Id: Ib65bc8e8c4d215ffdc9fdb1c7ace98b7f36a16c8