Rewire room-compiler-processing-testing prepareTestConfiguration task
Rewire room-compiler-processing-testing prepareTestConfiguration task

Instead of passing a directory, pass in a directory through a task map
so that task dependency is retained.

Test: ./gradlew room:room-compiler-processing-testing:test ->
      this still has prepareTestConfiguration in the task list
      https://ge.androidx.dev/s/q54kgyjitdjse/timeline#mwdbtisoibveu
Change-Id: I9f66dd255f6e365768f2a7dec2deb6cbc2ca0e41

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