Settings: SlimPIE the second (2/2)

This commit changes the following:
- add possibility to set trigger height on the left and right trigger
- add possibility to set gravity on the lef and right trigger
- change touch detection logic and calculation (it shows now up immediately...super fast :p)
- reduces values in dimens.xml because of the new touch detection much lesser are needed
- remove on settings the shown values on the left @seekbar on entries where it does not make sense
- reset menu for trigger dimensions
- minor string changes
- cleanup
- minor bugfixes

for me it is now like a PIE should be lol

cheers

Change-Id: Ib31025a05b94da6718d2ff66178a7657075e4c90

Conflicts:
	src/com/android/settings/widget/SeekBarPreference.java