Fixes#750
Currently, Keyman for Android targets SDK version 25 (Nougat).
This PR targets the latest Android API and updates all the Gradle dependencies to the latest. This will remove some lint Obsolete warnings.
Sample and Test projects needed to add
```
implementation 'com.android.support:support-v4:27.1.1'
```
to ensure all dependencies use the same version.
Consumers of KMEA need to include Firebase and Crashlytics dependencies, but don't need to run the Google services. This simplifies these projects of not neeeding google-services.json.
Also added `-no-daemon` and `-debug` options to Samples and Test `build.sh` scripts so they can be run on CI servers.
Per Android Studio 3.0 [Release Notes](https://android-developers.googleblog.com/2017/10/android-studio-30.html)
-Update gradle version
-Change deprecated `compile` dependencies to `implementation` or `api`
-Change maven repositories to google (triplet plugin still on maven)
- Update readme instructions for using the engine
n trying to build Keyman for Android on Linux, the following issues needed to be fixed:
Set `build.sh` and `gradlew` scripts to executable
KMEA/build.sh needs an OS check so build.bat is only called on Windows
web/source/build.sh needs $compiler and $copmiler_warnings values in quotes
