Currently the ExoPlayerWrapper is used to run tests using an ExoPlayer
implementation. Some properties of the test are set in the constructor, some
are set by overloading the class, others are hard-coded in the
ExoPlayerWrapper class, and a mechanism similar to the existing ActionSchedule
is missing.
This change does the following:
1. Renames ExoPlayerWrapper to ExoPlayerTestRunner as it better reflects
its purpose.
2. Adds an internal Builder to easily set-up the test in a coherent way. This
allows to only set necessary test components while using defaults for the rest.
3. Integrate ActionSchedule.
4. Apply the new structure to the existing tests currently using ExoPlayerWrapper.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=163186578
b631755b63