PEEK: configurable pickup timeout (1/2)

- Allow the user to set different pickup timeout when a notification comes up through PEEK.
Options:
10 sec (default)
30 sec
45 sec
1 min
2 min

Change-Id: I82650f376b1dee81b5872317c70506d580361d49
Merge branch 'kitkat' of github.com:X-ROM/android_packages_apps_Settings into kitkat