Simulcast layer and datastream hotfixes (#749)

* Discard extra simulcast layers equal to original resolution

* amend changeset description

* Wrap exceptions thrown in sendText and sendFile into Result

+---
+"client-sdk-android": patch
+---
+
+Fix crash caused by extra simulcast layers equal to original resolution

+---
+"client-sdk-android": patch
+---
+
+Wrap exceptions thrown in sendText and sendFile into Result

@@ -61,16 +61,20 @@ interface OutgoingDataStreamManager {
      */
     @CheckResult
     suspend fun sendText(text: String, options: StreamTextOptions = StreamTextOptions()): Result<TextStreamInfo> {
-        val sender = streamText(options)
-        val result = sender.write(text)
-
-        if (result.isFailure) {
-            val exception = result.exceptionOrNull() ?: Exception("Unknown error.")
-            sender.close(exception.message)
-            return Result.failure(exception)
-        } else {
-            sender.close()
-            return Result.success(sender.info)
+        try {
+            val sender = streamText(options)
+            val result = sender.write(text)
+
+            if (result.isFailure) {
+                val exception = result.exceptionOrNull() ?: Exception("Unknown error.")
+                sender.close(exception.message)
+                return Result.failure(exception)
+            } else {
+                sender.close()
+                return Result.success(sender.info)
+            }
+        } catch (e: Exception) {
+            return Result.failure(e)
         }
     }
 
@@ -79,16 +83,20 @@ interface OutgoingDataStreamManager {
      */
     @CheckResult
     suspend fun sendFile(file: File, options: StreamBytesOptions = StreamBytesOptions()): Result<ByteStreamInfo> {
-        val sender = streamBytes(options)
-        val result = sender.writeFile(file)
-
-        if (result.isFailure) {
-            val exception = result.exceptionOrNull() ?: Exception("Unknown error.")
-            sender.close(exception.message)
-            return Result.failure(exception)
-        } else {
-            sender.close()
-            return Result.success(sender.info)
+        try {
+            val sender = streamBytes(options)
+            val result = sender.writeFile(file)
+
+            if (result.isFailure) {
+                val exception = result.exceptionOrNull() ?: Exception("Unknown error.")
+                sender.close(exception.message)
+                return Result.failure(exception)
+            } else {
+                sender.close()
+                return Result.success(sender.info)
+            }
+        } catch (e: Exception) {
+            return Result.failure(e)
         }
     }
 }

@@ -786,7 +786,11 @@ internal constructor(
         } else if (simulcast) {
             fun addEncoding(videoEncoding: VideoEncoding, scale: Double) {
                 if (scale < 1.0) {
-                    LKLog.w { "Discarding encoding with a scale < 1.0: $scale." }
+                    LKLog.w { "Discarding encoding with a scale down < 1.0: $scale." }
+                    return
+                }
+                if (scale == 1.0 && videoEncoding !== originalEncoding) {
+                    LKLog.w { "Discarding duplicate encoding with a scale down == 1.0: $scale." }
                     return
                 }
                 if (encodings.size >= EncodingUtils.VIDEO_RIDS.size) {