fix(core): make frame pts and dts immutable

Author: ThibaultBee

core/src/main/java/io/github/thibaultbee/streampack/core/elements/data/Frame.kt

@@ -61,12 +61,12 @@ data class Frame(
     /**
      * Presentation timestamp in µs
      */
-    var ptsInUs: Long,
+    val ptsInUs: Long,
 
     /**
      * Decoded timestamp in µs (not used).
      */
-    var dtsInUs: Long?,
+    val dtsInUs: Long? = null,
 
     /**
      * [Boolean.true] if frame is a key frame (I-frame for AVC/HEVC and audio frames)

extensions/rtmp/src/main/java/io/github/thibaultbee/streampack/ext/rtmp/elements/endpoints/RtmpEndpoint.kt

@@ -107,7 +107,7 @@ class RtmpEndpoint internal constructor(private val coroutineDispatcher: Corouti
                     rtmpClient.write(
                         flvData,
                         ts.toInt(),
-                    ).await()
+                    )
                 }
                 if (flvData is AutoCloseable) {
                     flvData.close()
@@ -149,7 +149,7 @@ class RtmpEndpoint internal constructor(private val coroutineDispatcher: Corouti
             rtmpClient.writeSetDataFrame(
                 flvDataBuilder.metadata
             )
-        }.await()
+        }
     }
 
     override suspend fun stopStream() {