Various fixes in AbstractAnimationAssert

- Correct a set of error messages for Animation#willChangeTransformationMatrix
- Compare against the expected value rather than the actual value for AbstractAnimationAssert#hasStartTime()

assertj-android/src/main/java/org/assertj/android/api/view/animation/AbstractAnimationAssert.java

@@ -116,7 +116,7 @@ public S hasStartTime(long time) {
     long actualTime = actual.getStartTime();
     assertThat(actualTime) //
         .overridingErrorMessage("Expected start time <%s> but was <%s>.", time, actualTime) //
-        .isEqualTo(actualTime);
+        .isEqualTo(time);
     return myself;
   }
 
@@ -213,15 +213,15 @@ public S isNotChangingBounds() {
   public S isChangingTransformationMatrix() {
     isNotNull();
     assertThat(actual.willChangeTransformationMatrix()) //
-        .overridingErrorMessage("Expected to be changing bounds but was not.") //
+        .overridingErrorMessage("Expected to be changing transformation matrix but was not.") //
         .isTrue();
     return myself;
   }
 
   public S isNotChangingTransformationMatrix() {
     isNotNull();
     assertThat(actual.willChangeTransformationMatrix()) //
-        .overridingErrorMessage("Expected to not be changing bounds but was.") //
+        .overridingErrorMessage("Expected to not be changing transformation matrix but was.") //
         .isFalse();
     return myself;
   }