Merge "Created new Task.h file to contain task classes." am: 166efb16 am: b85df5f7

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2410952



Change-Id: I1f8e3bd95a7b7a4f98f7888ee828d69c0eed177e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>