Added JmeSurfaceView.java class , for embedding jme-game in a custom xml UI-design. (jMonkeyEngine#1494)

* Added JmeSurfaceView.java class , for embedding jme-game in a custom xml UI design.

* Removal of white spaces

Removal of white spaces between if...else conditions & class methods.

* Removal of white spaces

* Cleaning up (formatting errors/jme copyright)

* Moved the class files into an independent package

* Handled the user delay for zero & negative numbers

* Cleaning up 2

Author: pavly-gerges

jme3-android/build.gradle

@@ -5,6 +5,8 @@ if (!hasProperty('mainClass')) {
 }
 
 dependencies {
+    //added annotations used by JmeSurfaceView.
+    implementation 'androidx.appcompat:appcompat:1.2.0'
     compile project(':jme3-core')
     compile project(':jme3-plugins')
     compileOnly 'android:android'