add Java APIs needed for WhatsApp MainActivity and ConversationActivity

src/api-impl/android/view/animation/AccelerateDecelerateInterpolator.java

@@ -1,5 +1,12 @@
 package android.view.animation;
 
-public class AccelerateDecelerateInterpolator {
+import android.animation.TimeInterpolator;
+
+public class AccelerateDecelerateInterpolator implements TimeInterpolator {
+
+	@Override
+	public float getInterpolation(float input) {
+		return input;
+	}
 
 }

src/api-impl/android/view/animation/AnimationSet.java

@@ -0,0 +1,8 @@
+package android.view.animation;
+
+public class AnimationSet extends Animation {
+
+	public AnimationSet(boolean shareInterpolator) {}
+
+	public void addAnimation(Animation animation) {}
+}

src/api-impl/android/view/animation/OvershootInterpolator.java

@@ -0,0 +1,6 @@
+package android.view.animation;
+
+public class OvershootInterpolator {
+
+	public OvershootInterpolator(float overshoot) {}
+}

src/api-impl/android/view/animation/ScaleAnimation.java

@@ -0,0 +1,6 @@
+package android.view.animation;
+
+public class ScaleAnimation extends Animation {
+
+	public ScaleAnimation(float fromX, float toX, float fromY, float toY, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue) {}
+}

src/api-impl/android/view/animation/TranslateAnimation.java

@@ -0,0 +1,6 @@
+package android.view.animation;
+
+public class TranslateAnimation extends Animation {
+
+	public TranslateAnimation(int fromXType, float fromXValue, int toXType, float toXValue, int fromYType, float fromYValue, int toYType, float toYValue) {}
+}