Making Some Changes to CompanionAdTestCase.java
##Rationale

##Changed Files
**OnceUxUiAutomatorBase.java**
* added constants
    * one int constant for timeouts to each ad break
    * one string constant to identify each ad break
      * int *msecToPreroll* = 5000
      * int *msecToMidroll* = 35000
      * int *msecToPostroll* = 112000
      * int *msecAdBreakLength* = 30000

**CompanionAdTestCase.java**
* added Class Constants section label
* implementing the use of the new superclass constants
  * methods now require string identifiers as parameters
  * updating javadocs to include the new parameters
* Renaming methods/objects
  * renamed adText to adTextUiObject to remove the idea that it might be a string.
  * renamed *toEndOfAdCheck* to **waitForEndOfAdCheck** to better describe what it is doing
  * renamed *toCompanionAdCheck* to **waitForCompanionAdCheck** to better describe what it is doing