Fix crash when UaProfUrlTagName is null

This change fixes a silent MMS lib crash when the UaProfUrlTagName is
empty.

Test: Tested manually by modifying the configs and using temporary log
lines

Bug: 128510421

Change-Id: I3500a5988d1b50e79599846cce641ec3bca923ca
(cherry picked from commit d7bdbde7a3b103589c1915e3333e66f998a3bfac)
1 file changed
tree: 0d0b52482f571c0347126ac5301091afd037e6b5
  1. res/
  2. src/
  3. Android.bp
  4. AndroidManifest.xml
  5. OWNERS
  6. proguard.flags