Increase maximum allowed size for status bar icons

The previous size was causing some apps to crash which otherwise worked
fine. This more closely matches the hard limit in RecordingCanvas
(which we need to stay below to prevent SystemUI from crashing).

Fixes: 182891864
Fixes: 182232777
Bug: 169255797
Test: atest StatusBarIconViewTest
Test: manual - posting notifications with different drawable sizes
Change-Id: I8deacc651e05a202ec980eeb8bcdf4f92daea8eb
(cherry picked from commit 5cd7976f)