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

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



Change-Id: Ie04e1ecc312c58e7ac696711f9b338243b60e975
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>