Fixed startActivity() Bug in LaunchActivityTest

Activity under test was called in setUp instead of each test method.
Now each test method makes a separate call to startActivity() like
mentioned in our documentation.

Change-Id: I41df74cd5dae30e57cb481bb85714e361a9189e8
Signed-off-by: Stephan Linzner <slinzner@google.com>
2 files changed