New Class TestPlayStartMess.java, Tweaking LifeCycle.java

##Rationale
A worrying scenario arose by tweaking the playVideo method in the OnceUxUiAutomatorBaseTestCase.java, so a new test class, **TestPlayStartMess.java**, was created to check any possible bugs that might occur in that scenario.
LifeCycle.Java, meanwhile, was behaving inconsistently, so it has been altered and toyed with to get more consistent results.

##Changed Files
OnceUxUiAutomatorBaseTestCase.java
* increased delay time of the play function by one second.
* changed playVideo's @exception tag to @throws tag, and more thoroughly defined it
* playVideo changed to toggle the seek controls before the initial press of the play function
* added seekControls utility method to standardize the process of toggling the seek controls viewability
* removed extranneous scrolling in tearDown.
LifeCycle.java
* added try and catch blocks to the pauseVideo utility method.
* implemented super.seekControls
* added some delays as necessary to avoid crashing the Sample App.
UiAutomatorTest.java
* removed extranneous author
TestPlayStartMess.java
* created playVideoSpecialized utility method to create the problematic scenario
* created testPlayStartMessFFWDCheck, testPlayStartMessREWCheck, and testPlayStartMessSeekBarCheck to check for the objects that should not be present at the start of an ad, but are often made accessible as a result of the scenario.