Update AWSIotTLSSocketFactory.java (#1192)

Author: desokroshan

aws-android-sdk-iot/src/main/java/com/amazonaws/mobileconnectors/iot/AWSIotTLSSocketFactory.java

@@ -27,10 +27,10 @@
 import static com.amazonaws.mobileconnectors.iot.AWSIotSslUtility.ALPN_EXTENSION;
 
 /**
- * AWS IoT TLS Socket Factory An extenstion to SSLSocketFactory to enable TLS
+ * AWS IoT TLS Socket Factory An extension to SSLSocketFactory to enable TLS
  * 1.2 on the socket. TLS 1.2 is required by the AWS IoT data plane (if TLS
  * Mutual Authentication). TLS 1.2 is not supported in Android API less than 16.
- * is supported but not enabled by default 16-20. is enabled 20+.
+ * It is supported but not enabled by default for API 16-20 and is enabled for API 20+.
  *
  * @see <a
  *      href="https://developer.android.com/reference/javax/net/ssl/SSLSocket.htmlh">Android