Fix EME expiration units.
Fix EME expiration units.

The expiration in EME should be in milliseconds, so we shouldn't be
converting to seconds.

Closes #112

Change-Id: Ic705308f0125f0f7f7cfc4b49d5eac112c4fcabd

shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded