Fix NPE for RingtonePickerActivity in Wear

There is no id "add_new_sound_text in add_new_sound_item layout.
It can't find the TextView and cause NPE.

Bug: 178990696
Test: manual. Verified by the partner.
Change-Id: I222bf8fce2cbc79b4c185907d261c95f5654fa91
1 file changed