liboboe: rename Oboe to AAudio

All of the edits were done using scripts in media/liboboe/scripts.
The conversion is done using SED, which is called from
convert_oboe_aaudio.sh
The conversion can be reverted when debugging using revert_all_aaudio.sh
The string substitutions are in oboe_to_aaudio.sed

Bug: 34749573
Test: cts/tests/tests/nativemedia/aaudio

Change-Id: Ia10b34472a90df2652b87607c99156e9084e57aa
Signed-off-by: Phil Burk <philburk@google.com>