dragon: DragonKeyboardFirmwareUpdater: Exclude the service other than the primary user

This CL adds a check to exclude the users other than the primary user from
invoking the update service and makes notification title navigate to the update
confirmation page.

Bug: 25831955, 26226972
TEST= build, check if the update notification pop up on the work profile, and
click on notification to see if it proceeds to the update confirmation page

Change-Id: I2667343ec666420e3d766d19393104d84e5c9f89
2 files changed