Add travis-ci matrix test

[danielpassos]

Enable travis to test in all Java/Android supported version

Java version:

• Java 7
• Java 8

  Android (no obsolete versions) supported

• Android 10
• Android 15
• Android 16
• Android 17
• Android 18
• Android 19
• Android 21
• Android 22

[danielpassos]

I'll open a new one for FH-3.8.0 branch