Stabilize, fix regression: GLDrawable.invoke(..) and Animator* display-loop 'closure'

GLDrawable.invoke(..) regression of commit c77b8f586cb2553582a42f5b90aeee5ef85f1efe:
  'wait' was not set to false, if 'deferredHere' was forced to 'false'.
  This could lead to the situation where GLRunnableTask
  will catch the exception and supresses it.

Animator/FPSAnimator post exception propagation code
   animThread = null; notifyAll();
must be complete to finalize animator state in case of an exception.
Decorate 'handleUncaughtException(..)' w/ try { } finally { }
where the latter ensures the mentioned 'closure'.