chore(android): refactor side loaded text tracks (#3754)

* perf: ensure we do not provide callback to native if no callback provided from app

* chore: rework bufferConfig to make it more generic and reduce ReactExoplayerView code size

* chore(android): refactor external text tracks management.

Split parsing and tracks handling

* chore: fix linter

android/src/main/java/com/brentvatne/common/api/SideLoadedTextTrack.kt

@@ -0,0 +1,34 @@
+package com.brentvatne.common.api
+
+import android.net.Uri
+import com.brentvatne.common.toolbox.ReactBridgeUtils
+import com.facebook.react.bridge.ReadableMap
+
+/**
+ * Class representing a sideLoaded text track from application
+ * Do you use player import in this class
+ */
+class SideLoadedTextTrack {
+    var language: String? = null
+    var title: String? = null
+    var uri: Uri = Uri.EMPTY
+    var type: String? = null
+    companion object {
+        val SIDELOAD_TEXT_TRACK_LANGUAGE = "language"
+        val SIDELOAD_TEXT_TRACK_TITLE = "title"
+        val SIDELOAD_TEXT_TRACK_URI = "uri"
+        val SIDELOAD_TEXT_TRACK_TYPE = "type"
+
+        fun parse(src: ReadableMap?): SideLoadedTextTrack {
+            val sideLoadedTextTrack = SideLoadedTextTrack()
+            if (src == null) {
+                return sideLoadedTextTrack
+            }
+            sideLoadedTextTrack.language = ReactBridgeUtils.safeGetString(src, SIDELOAD_TEXT_TRACK_LANGUAGE)
+            sideLoadedTextTrack.title = ReactBridgeUtils.safeGetString(src, SIDELOAD_TEXT_TRACK_TITLE, "")
+            sideLoadedTextTrack.uri = Uri.parse(ReactBridgeUtils.safeGetString(src, SIDELOAD_TEXT_TRACK_URI, ""))
+            sideLoadedTextTrack.type = ReactBridgeUtils.safeGetString(src, SIDELOAD_TEXT_TRACK_TYPE, "")
+            return sideLoadedTextTrack
+        }
+    }
+}

android/src/main/java/com/brentvatne/common/api/SideLoadedTextTrackList.kt

@@ -0,0 +1,27 @@
+package com.brentvatne.common.api
+
+import com.facebook.react.bridge.ReadableArray
+import com.facebook.react.bridge.ReadableMap
+
+/**
+ * Class representing a list of sideLoaded text track from application
+ * Do you use player import in this class
+ */
+
+class SideLoadedTextTrackList {
+    var tracks = ArrayList<SideLoadedTextTrack>()
+
+    companion object {
+        fun parse(src: ReadableArray?): SideLoadedTextTrackList? {
+            if (src == null) {
+                return null
+            }
+            var sideLoadedTextTrackList = SideLoadedTextTrackList()
+            for (i in 0 until src.size()) {
+                val textTrack: ReadableMap = src.getMap(i)
+                sideLoadedTextTrackList.tracks.add(SideLoadedTextTrack.parse(textTrack))
+            }
+            return sideLoadedTextTrackList
+        }
+    }
+}