base

Rename of DoodleEffect as part of cleanup (Bug 5287103).

The DoodleEffect semantics have been considerably simplified so that the
name no longer fits the effect outcome. Renamed to BitmapOverlayEffect
(EFFECT_BITMAPOVERLAY).

This is the necessary change to the current.txt.

Change-Id: I43fe0e1f99ec6aedbcb53b186ac322cc51ee83ab