Add DeviceConfig flag for drag direction angle threshold for cursor drag

Bug: 160786691
Test: Manual and unit tests
  atest FrameworksCoreTests:EditorTouchStateTest
  atest FrameworksCoreTests:EditorCursorDragTest
Change-Id: Ib2e88fbdce4f901772d73bc7ee60483c98e02509
Merged-In: Ib2e88fbdce4f901772d73bc7ee60483c98e02509
(cherry picked from commit 8bac79d6)