added fast toggle preference

Patch Set 2: removed debug and useless code
Patch Set 3: added ability to choose between left and rigth handed usage
Patch Set 4: magically removed .classpath
Patch Set 5: go away classpath
Patch Set 6: aaand ... .classpath is gone.
Patch Set 7: I kill mysely if the classpath is still there
Patch Set 8: Rebased
Patch Set 9: The revision that never existed
Patch Set 10: Remove whitespace and hide options on tablets
Patch Set 11: Use summary to be descriptive
Patch Set 12: Rebased
Patch Set 13: add dependency in the preference xml

Change-Id: I38934a9fe764be9078814ea02462554f11d208ac