Change 1f9196a8e5de9b004e61afabc70b18caf7cf9c7e introduced
an issue when trying to ignore audio focus entries in the
stack that don't use the music stream, or are for transient
audio focus gain, for remote control display updates.
The bug was that the audio focus stack traversal was not
starting from the top, as it should. It was using
the iterator order, which, in the case of a stack, starts
with the bottom-most entry.
The fix consists in traversing the stack from the top, i.e.
from the last element of the vector used to hold the stack
entries.
Bug 7311023
Change-Id: I0c1900dbf98599a621a420ab55531a3eee838fe5
4dd3fb3e2c