RUM-8038: Double average batch processing level

Author: jonathanmos

dd-sdk-android-core/src/main/kotlin/com/datadog/android/core/configuration/BatchProcessingLevel.kt

@@ -23,9 +23,9 @@ enum class BatchProcessingLevel(val maxBatchesPerUploadJob: Int) {
     LOW(maxBatchesPerUploadJob = 1),
 
     /**
-     * 10 batches will be sent in a single upload cycle.
+     * 20 batches will be sent in a single upload cycle.
      */
-    MEDIUM(maxBatchesPerUploadJob = 10),
+    MEDIUM(maxBatchesPerUploadJob = 20),
 
     /**
      * 100 batches will be sent in a single upload cycle.