Merge "Merge "Updates and refactors notification wear sample to work on sdk 26...

Merge "Merge "Updates and refactors notification wear sample to work on sdk 26 and use the latest support library widgets. I also refactored some code that was used in multiple places into a Shared module." into oc-dev am: b7bc75f3 am: 6be4efc7" into oc-dr1-dev-plus-aosp am: aa14181b
am: ee48a9f8

Change-Id: I1b5ea06b887ea3a81a4b6b120e967c4bd278b5f7