GestureExclusion: Fix restriction priority

Bottom restrictions should be applied first.

Bug: 135522625
Test: adb shell setprop debug.pointerlocation.showexclusion true; adb shell stop; adb shell start; open app excluding entire edge, verify bottom part is applied.
Change-Id: Ifc2bc64b1ce3132f198e23ae8e271380acf0c5a1