Quicksettings: Add separate dimension for dual switch icon

Support Themers (for ex the ones who change QS icon sizes).
Right now it streams default one that is themed, and a bigger icon
theme will mess it up.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Conflicts:
	packages/SystemUI/res/values/simpleaosp_dimens.xml

Conflicts:
	packages/SystemUI/res/values/simpleaosp_dimens.xml