Remove handleLongClick on dreamTile

Currently, handleLongClick would awaken dream but that takes the device
to the lock screen instead of the bouncer. Removing handleLongClick so
that long click has the same behavior as other tiles.

Bug: 286108889
Test: When dreaming, long click screensaver tile and it will take to you
the bouncer.

Change-Id: Ied650cdbac13fa2a0b1419f7e1379b81255e1f5f