Active display: Add sunlight mode. [1/2]

Change-Id: I541e74c5a1a7e6ce5028ab00cf998bba1d4fe0f9

Conflicts:
	core/java/android/provider/Settings.java
Delay hiding systemui by 100ms
When disabling the keyguard, the systemui visibility is
changed and can occur after we hide it so delaying this
a bit resolves that issue.

Change-Id: Iad432f75195983837d643fa38495e6beb54f3e22
Active display: make sure mNotificaiton is set correctly

Change-Id: I4111ca843e340cca4d6dac4b2c2922ce3039e487
Active display: register/unregister recievers and listeners when enabled/disabled

Change-Id: Ic73e63da2c9634bc864ab1a1387eb9145eb0b5b0
Active display: Unify (un)registering callbacks and add proper checks.

Change-Id: Ie4c4660a54d2c60831f7a3bcc66b3a9ca1d035f2
Active display: allow hiding low priority notifications. [1/2]

Change-Id: I4831d6864b509e62b449c25619c59f5d6760ec47
Active display: Enable proximity sensor only when screen is off

This should ease people worried about cpu usage of the proximity
sensor while the screen is on.  The sensor listener will only be
registered when the screen goes off, and both active display and
pocket mode are enabled.  Once the screen turns on this listener
will be unregistered so no further updates are received when the
sensor values change.

Change-Id: I70979b5931815adb74bd8bc42e32886a6d829a12
Active display: Use a default notificaiton icon.

In case there is an exception when trying to load the
notification icon we will use a default one.

Change-Id: I4087ef3e407cf976f7bfb2bb89f850641101bc73
Active display: Only fetch next notification if mNotification is null.

Change-Id: Ife8511d4a4b8c448bc7aa8997a250068bec5fae7
Active display: Don't show active display if call state is not idle.

This will prevent active display from displaying when a call is
coming in and let the call screen show up instead of active display.

Change-Id: I2cb79e097ae24dc6ad6c8a33be88eb19f7d8d235