android: Allow running some singletons in parallel. am: e59c0db5 am:...

android: Allow running some singletons in parallel. am: e59c0db5 am: bef24e82 am: f47cd87d am: 40c861b7 am: 52de5397

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2593066



Change-Id: Iee0fa808d6ab5dac80951c9010f1761ae8ddf8a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>