httplive: check for malformed EXT-X-STREAM-INF

Bug: 68342866
Test: adb shell am start -a android.intent.action.VIEW -d http://localhost:1137/index.html
Change-Id: I479f9e0b7ca828d048ef88b23b4948e3c1472b3c
(cherry picked from commit e3bd8dd81e51b4d02484e7eec0d725ba9c254c68)
1 file changed