Allow trackpad to tune RAPID_DECELERATION_FACTOR for gesture nav

- RAPID_DECELERATION_FACTOR determines whether swipe up from app takes the user to overview vs. home

Bug: 355457714
Test: adb shell setprop trackpad_in_app_swipe_up_deceleration_factor 0.6f
Flag: EXEMPT bugfix

Change-Id: I205e72c82dc08b9e542420ca1adc8f7c0eb0953d