flo: increase vmalloc size by 100MB (240MB-->340MB)

b/18402205 External reports: Video playback failing on Flo after upgrade to
	   Lollipop
Change-Id: I8569a59f357a0bd689ed5a86da27fcf524a28143
Signed-off-by: Iliyan Malchev <malchev@google.com>