Revert these 2 Active Display commits

Revert "Active-D: Make GlowPadView center the current notification icon for us"

This reverts commit 20bde1981c74f816cfc29a9c3560caca177ee032.

Revert "Active display: Catch Resources.NotFoundException"

This reverts commit f982154c1098cdd245b5231aca955e738b7da1d2.

Change-Id: I8e93ddc98d589e3808924a90bd2a748c5c496275
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