Refactor more keys menu framework (part 2)

- Integrate pointer tracking between more keys menu, more suggestions menu, and main keyboard.
- Adds multi-touch support for more keys menus. Long press with one finger and select keys with another finger.

Bug: 7508007

Change-Id: I394f28cd79e342d6bcfea573af72aa33b9def00f
7 files changed
tree: 0f93290e581f9c4773f528f5e1404e06fe1f5a91
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk