Add litho framework events

Summary: Leverages the new connection listener inside the ui debugger to send framework events out of the Litho debug api and to the UIDebugger

Reviewed By: adityasharat

Differential Revision: D48350647

fbshipit-source-id: 2af48578b70bc50da43712f244f2bd208ad40988

android/src/main/java/com/facebook/flipper/plugins/uidebugger/model/FrameworkEvents.kt

@@ -17,8 +17,11 @@ data class FrameworkEventMetadata(
 
 @kotlinx.serialization.Serializable
 data class FrameworkEvent(
+    val treeId: Id,
     val nodeId: Id,
     val type: String,
-    val timestamp: Long,
-    val thread: String
+    val timestamp: Long,  //millis since epoch
+    val duration: Long?,   //in Nanoseconds
+    val thread: String,
+    val payload: Map<String, String> //can be json
 )