Yohei Yukawa 5f531f1f36 Make VIMS.SettingsObserver multiuser-aware.
VoiceInteractionManagerService.SettingsObserver has been used
to monitor per-user settings hence we have to take care of
multiuser scenario.

In the case of VoiceInteractionManagerService, monitoring
changes from all the users is OK because event handlers will
read settins from the current user anyway.

Bug: 21766395
Change-Id: I357fe2a7e2a5645355e696c6fbaae762f54ca029
2015-06-10 21:15:00 -07:00
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