Updated the samples to work with the Brightcove Native Player SDK for
Android version 4.2.7.

AdRulesIMASampleApp/src/main/java/com/brightcove/player/samples/ima/adrules/MainActivity.java
AdRulesIMAWidevineSampleApp/src/main/java/com/brightcove/player/samples/imawidevine/adrules/MainActivity.java
BasicIMASampleApp/src/main/java/com/brightcove/player/samples/ima/basic/MainActivity.java
BasicIMAWidevineSampleApp/src/main/java/com/brightcove/player/samples/imawidevine/basic/MainActivity.java
HLSPlayerIMASampleApp/src/main/java/com/brightcove/player/samples/ima/hls/MainActivity.java
BasicCastSampleApp/src/main/java/com/brightcove/player/samples/cast/basic/GoogleCastSampleFragment.java

  * Removed lifecycle management logic now that it's built into the
    SDK and plugins.

AdRulesIMASampleApp/src/main/res/values/version.xml
AdRulesIMAWidevineSampleApp/src/main/res/values/version.xml
BasicCastSampleApp/src/main/res/values/version.xml
BasicIMASampleApp/src/main/res/values/version.xml
BasicIMAWidevineSampleApp/src/main/res/values/version.xml
HLSPlayerIMASampleApp/src/main/res/values/version.xml

  * Updated the Google Play Services version from 4323000 to 5208000.

BasicCastSampleApp/src/main/AndroidManifest.xml

  * Added theme to the MainActivity to fix the missing cast menu option.

BasicCastSampleApp/src/main/java/com/brightcove/player/samples/cast/basic/MainActivity.java

  * Moved to an XML layout fragment approach instead of using fragment transactions.

BasicCastSampleApp/src/main/res/layout/basic_cast.xml

  * Changed from a FrameLayout to a fragment tag.

build.gradle

  * Updated the Google Play Services dependency from 4.3.+ to 5.2.08.
Revert the removal of the gradle-download-task.
Merge pull request #67 from BrightcoveOS/4.2.7-update

Updated the samples to work with the Brightcove Native Player SDK for Android version 4.2.7.