Add flag to get the name of the Model file from the flag in case we want
to try out different models. In addition, we should not log touches in
the middle of the screen for logging so moving the block at the very
beginning.

Test: unittest, manual test
Bug: 150170384
Change-Id: I6ecb556fea01f26323248b999d17c7b1d1b7eeb7
Merged-In: I6ecb556fea01f26323248b999d17c7b1d1b7eeb7

• core/java/com/android/internal/config/sysui/SystemUiDeviceConfigFlags.java[diff]
• packages/SystemUI/src/com/android/systemui/SystemUIFactory.java[diff]
• packages/SystemUI/src/com/android/systemui/statusbar/phone/EdgeBackGestureHandler.java[diff]