TV audio output: avoid two TV Defaults

Previously on set top boxes with internal speakers we would have
duplicate namings and icons. Updating namings for both internal speaker
and HDMI and icon for internal speaker based on TV device type.

Bug: 299590878
Test: manual
Test: atest DeviceIconUtilTest
Flag: EXEMPT bugfix

Change-Id: I1beb7bea8504d39060ad6d1b526e2978649bb604