Proximity Wake-Up : adjust strings

Change-Id: I605a11b5bd7150b2a456d5c355af49fd7047e17
Add summary to notification filtering

Change-Id: Ie02165f72e67b2fc6aa086de61303a53a7ee4470
Disable settings search on all subactivities.

This leaves the search in place in multi-pane configurations, and keeps
it only in the main settings screen for single-pane configurations.

Change-Id: I2db74193d534b66e1faf20293996c611621dfe58

Conflicts:
	src/com/android/settings/Settings.java