[BUG] audio: Misalignement of Native/Java AudioAttributes

Native audio attributes are initialized with a default source,
whereas JAVA AudioAttributes are initialized with an INVALID source.
It leads to equality failure, thus preventing to identify the
right strategy / volume group.
This CL fixes this misalignement by using the builder constructor
from AudioAttributes, thus cleaning the input source.

Test: AudioVolumeGroupTest
Bug: 238058094

Signed-off-by: Francois Gaffie <francois.gaffie@renault.com>
Change-Id: I1dca99cf60c8b3a6291743dc299324374e5752a6

Signed-off-by: François Gaffie <francois.gaffie@renault.com>
Change-Id: I13d216814db66369ae72b496f4c9ae724cc40561