M3UParser: make url on demand

Bug: 77823362
Test: adb shell am start -a android.intent.action.VIEW -d http://10.42.0.1:8080
Change-Id: Ieaf8a13985277eee5b085ed243205a597627cf5e
(cherry picked from commit 26e236bd426770869644a9962778dedea7bf59be)
2 files changed