Use full jar name when depending on room-common-java8.
Use full jar name when depending on room-common-java8.

Using a wildcard include can lead to multiple jars of different versions
being included if the build server or local build has been previously
built with a different version, causing the output folder to contain
multiple jars which will be included thus causing a same-class conflict.

Bug: 131265008
Test: Manual, bump Room version and build, verify aar contains only one
      jar of correct version.
Change-Id: I5a26b986907c8dc7344c89530c74ac535eead08a

androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx