OboeTester Data Path Tests don't check for shared mode correctly

[robertwu1]

Non-MMAP streams don't have the idea of a sharing mode. We should check this only for exclusive streams

    protected String whyShouldTestBeSkipped() {
        String why = "";
        StreamConfiguration requestedInConfig = mAudioInputTester.requestedConfiguration;
        StreamConfiguration requestedOutConfig = mAudioOutTester.requestedConfiguration;
        StreamConfiguration actualInConfig = mAudioInputTester.actualConfiguration;
        StreamConfiguration actualOutConfig = mAudioOutTester.actualConfiguration;
        // No point running the test if we don't get any of the sharing modes we requested.
        if (actualInConfig.getSharingMode() != requestedInConfig.getSharingMode()
                && actualOutConfig.getSharingMode() != requestedOutConfig.getSharingMode()) {
            log("Did not get requested sharing mode.");
            why += "share,";
        }