Using deselect in onStartTabSelected throws IndexOutOfBounds exeption

As the title says. Using NavigationTabBar#deselect when onStartTabSelected gets called.

It will not throw the error in onEndTabSelected. The stacktrace said the error came from line 868 and 877 in NavigationTabBar.java

I dug around a bit in your code and adding a ```&& mIndex != INVALID_INDEX``` to the if statement, above the two mentioned lines, fixed the issue.