Avoid using collection interface, using array instead

...nputmethod/accessibility/AccessibilityEntityProvider.java

...om/android/inputmethod/compat/MotionEventCompatUtils.java

java/src/com/android/inputmethod/keyboard/Keyboard.java

.../src/com/android/inputmethod/keyboard/PointerTracker.java

java/src/com/android/inputmethod/keyboard/ProximityInfo.java

...droid/inputmethod/keyboard/internal/KeyboardIconsSet.java