feat(notification): implement Android and iOS APIs (#340)

plugins/notification/android/src/main/java/NotificationAction.kt

@@ -0,0 +1,47 @@
+package app.tauri.notification
+
+import app.tauri.Logger
+import app.tauri.plugin.JSArray
+import app.tauri.plugin.JSObject
+import org.json.JSONObject
+
+class NotificationAction() {
+  var id: String? = null
+  var title: String? = null
+  var input = false
+
+  constructor(id: String?, title: String?, input: Boolean): this() {
+    this.id = id
+    this.title = title
+    this.input = input
+  }
+
+  companion object {
+    fun buildTypes(types: JSArray): Map<String, List<NotificationAction>> {
+      val actionTypeMap: MutableMap<String, List<NotificationAction>> = HashMap()
+      try {
+        val objects: List<JSONObject> = types.toList()
+        for (obj in objects) {
+          val jsObject = JSObject.fromJSONObject(
+            obj
+          )
+          val actionGroupId = jsObject.getString("id")
+          val actions = jsObject.getJSONArray("actions")
+          val typesArray = mutableListOf<NotificationAction>()
+          for (i in 0 until actions.length()) {
+            val notificationAction = NotificationAction()
+            val action = JSObject.fromJSONObject(actions.getJSONObject(i))
+            notificationAction.id = action.getString("id")
+            notificationAction.title = action.getString("title")
+            notificationAction.input = action.getBoolean("input")
+            typesArray.add(notificationAction)
+          }
+          actionTypeMap[actionGroupId] = typesArray.toList()
+        }
+      } catch (e: Exception) {
+        Logger.error(Logger.tags("Notification"), "Error when building action types", e)
+      }
+      return actionTypeMap
+    }
+  }
+}