Expanding on UiAutomatorTest.java

##Rationale
UiAutomatorTest.java tests the super.setUp and super.tearDown methods, making asserts that each of the important objects is present.

##Changed Files
OnceUxUiAutomatorBase.java
* declared more UiObjects as protected for testing purposes
* slight retooling of the setUp.

UiAutomatorTest.java
* added test methods to assert that the correct objects are defined properly.
* added try/catch blocks so the test will fail if either of the super.setUp or super.tearDown methods have UiObjectNotFound Exceptions, then the test will fail.

LearnMoreTestCase.java
* Added Override tag to setUp, changed declared exceptions