Remove the field of MediaDrm from inner class CryptoSession.

As CryptoSession is an inner (non-static) class of MediaDrm,
it's not necessary to pass in a reference of MediaDrm while
creating a CryptoSession instance.


bug: 27607931

Change-Id: Ic3cc03f885d14bc8d93287c918e778550cc21b58
1 file changed