Clean up a11y for speaker detail block.
Clean up a11y for speaker detail block.

BUG: 37714756
Change-Id: Ic79ad5b605aad7fbb375d8ea69b8e5c97ed15a6c

jarekankowski/iosched,jarekankowski/iosched,WeRockStar/iosched,WeRockStar/iosched,WeRockStar/iosched,jarekankowski/iosched