Revert "QuickSettings: Use a Bug Report tile icon of proper size"

This reverts commit 588c4130763deab96926339b5dec8cd3ee5dce2e.

Conflicts:
	packages/SystemUI/src/com/android/systemui/quicksettings/BugReportTile.java

Change-Id: I9cd870b7b8de07d59967c771507f431224cdf99c