settings: reset protected apps view instead of finish the activity

Finish the app after resettings the account, will lead to the protected app selection without a
valid pattern. Instead this should reset the pattern view to create a new pattern prior to go to
protected apps.

Change-Id: Ida41a29f4f8787940f803a23014a68a2f8beb969
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>