update summary change no matter whether summary is equal

Since the method parameter tile and tile in adpater is the same
instance, it is useless to check whether summary has changed.

Test: Run SettingsRoboTests
The function used in notifySummaryChanged already has testcases
in DashboardDataTest

Change-Id: I8c8969fcd2c89f368ca507808910fc7a9852f192