chore(android): include keyman-engine as sub-project

[ermshiperete]

Adding keyman-engine as a sub-project to KMAPro as well as the sample apps and KeyboardHarness allows Android Studio to load both at the same time which makes it easier to debug and develop.

Test-bot: skip

[keymanapp-test-bot]

User Test Results

Test specification and instructions

User tests are not required

Test Artifacts

• Android
  • Keyman for Android apk - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for Android apk - build : all tests passed (no artifacts on BuildLevel "build")
  • KeyboardHarness apk - build : all tests passed (no artifacts on BuildLevel "build")
  • KMSample1 apk - build : all tests passed (no artifacts on BuildLevel "build")
  • KMSample2 apk - build : all tests passed (no artifacts on BuildLevel "build")

[jahorton]

I love doing it for our main Keyman app, no question. Not sure about doing it for sample apps, though - external 3rd parties may not wish to link Keyman Engine for Library as a full-on subproject.

[ermshiperete]

I love doing it for our main Keyman app, no question. Not sure about doing it for sample apps, though - external 3rd parties may not wish to link Keyman Engine for Library as a full-on subproject.

Good point. What about we'd add the non-subproject option as comment? I suggested the changes for KMSample1, but the same would have to be done for KMSample2 as well.

[jahorton]

I love doing it for our main Keyman app, no question. Not sure about doing it for sample apps, though - external 3rd parties may not wish to link Keyman Engine for Library as a full-on subproject.

Good point. What about we'd add the non-subproject option as comment? I suggested the changes for KMSample1, but the same would have to be done for KMSample2 as well.

I feel like @mcdurdin would want to chime in on this.