Revert "QS smaller tile: adjust the margin"

This reverts commit c74ba111643b0eeb66b123a82348a5a42d22dabd.
Revert "QS smaller tiles: set icon margin based on density of device"

This reverts commit 3cbc5abb2b7fb4f8db0cd502d8d167f26a3b2757.

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

Change-Id: I477b224c14039f6c5811278efa14e7e604e1a7e9