Fix aosp generic fallback configuration sample rate

The configuration sample rate format is restricted by the XSD.
It is supposed to be a list of number separated by commas.
In the generic configuration they was a space after a comma.

Bug: 65535343
Test: Following script:

setup() {
    BUILD_ID=$1
    TARGET_PRODUCT=$2
    TARGET_BUILD_TYPE=${3:-userdebug}
    TARGET_ARCH=${4:-arm64}
    set +x

    echo "The following three variables can be overridden" \
         "by setting the corresponding environment variable"
    set -x
    TEST_SUITES_TARGET=${VTS_TEST_SUITES_TARGET:-test_suites_${TARGET_ARCH}}
    BASE_TARGET=${VTS_BASE_TARGET:-${TARGET_PRODUCT}-${TARGET_BUILD_TYPE}}
    AOSP_TARGET=${VTS_AOSP_TARGET:-aosp_${TARGET_ARCH}_ab-${TARGET_BUILD_TYPE}}
    set +x

    download() {
        local target=$1
        local file=$2
        test -f $file ||
            /google/data/ro/projects/android/fetch_artifact --bid $BUILD_ID --target $target $file ||
            { local r=$?; rm $file; return $r; }
    }

    echo "Downloading"
    download $TEST_SUITES_TARGET 'android-vts.zip'
    download $BASE_TARGET "${TARGET_PRODUCT}-img-${BUILD_ID}.zip"
    download $AOSP_TARGET "aosp_${TARGET_ARCH}_ab-img-${BUILD_ID}.zip"

    echo "Unzipping"
    rm -r system.img android-vts
    unzip aosp_${TARGET_ARCH}_ab-img-$BUILD_ID.zip system.img
    unzip android-vts.zip

    echo "Building vbmeta without verity"
    avbtool make_vbmeta_image --flag 2 --output vbmeta.img

    set -x
    adb reboot bootloader
    fastboot update ${TARGET_PRODUCT}-img-$BUILD_ID.zip --skip-reboot
    fastboot flash vbmeta vbmeta.img || echo "Warning: Device does not support vbmeta"
    fastboot erase system
    fastboot flash system system.img
    fastboot erase metadata
    fastboot -w
    fastboot reboot
    
    echo "Board setup"
    echo "You may now start vts-tradefed with:"
    echo '$ ANDROID_BUILD_TOP= PATH="$PWD:$PATH" vts-tradefed'
}
VTS_TEST_SUITES_TARGET=test_suites_arm64_fastbuild3d_linux setup 4327646 sailfish

runTest() {
    ANDROID_BUILD_TOP= PATH="$PWD/android-vts/tools:$PATH" vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VtsHalAudioV2_0Target -t CheckConfig.audioPolicyConfigurationValidation
}
runTest
# Test fail as expected
adb root ; adb disable-verity ; adb reboot ; adb wait-for-device ; adb root ; adb wait-for-device ; adb remount
# Apply the patch
adb shell sed -i -e 's/8000, 16000/8000,16000/' /system/etc/primary_audio_policy_configuration.xml
rutTest
# Test succeed !

Change-Id: I2a39606cd820b5cd27a640248bf692204ec2cd71
Signed-off-by: Kevin Rocard <krocard@google.com>