Fix get languages available for Oreo

[2-towns]

An issue was opened here : https://issuetracker.google.com/issues/73044965

[ramanihiteshc]

ing *str = @"Hello friend, how are you?";

AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc]init];

AVSpeechUtterance *speechutt = [AVSpeechUtterance speechUtteranceWithString:strtext]; speechutt.volume=90.0f; speechutt.rate=0.50f; speechutt.pitchMultiplier=0.80f; [speechutt setRate:0.3f]; speechutt.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"en-us"]; [synthesizer speakUtterance:speechutt];