added 2.2.4 to prebuilts/gradle-plugin

Test: integration tests
Bug: b.android.com/230285
Change-Id: If6a9a408fd32b5e8cf0c5d4911e6e3d0ec862a68
351 files changed
tree: 0a0df39e46625c1c0f8e3e88423f3b8d20d25c61
  1. com/
  2. .gitignore