Ignore binder buffer overflow in startListening

AppWidgetHost#startListening can fail with a binder buffer overflow when
widget RemoteViews are too large. This change, mirroring the behavior on
launcher, ignores the error, until a framework fix is available.

Fix: 402970061
Test: none; the change simply ignores an exception which is not
      consistently reproducible
Flag: EXEMPT bugfix
Change-Id: Idda00213f43e390b913780fc6504bc5ba7407ea1