Add ability to sync all groups at once

library/src/androidTest/java/org/xmtp/android/library/GroupTest.kt

@@ -892,4 +892,49 @@ class GroupTest {
 
         assertEquals(preparedMessageId, message.id)
     }
+
+    @Test
+    fun testSyncsAllGroupsInParallel() {
+        val boGroup = runBlocking {
+            boClient.conversations.newGroup(
+                listOf(
+                    alix.walletAddress,
+                )
+            )
+        }
+        val boGroup2 = runBlocking {
+            boClient.conversations.newGroup(
+                listOf(
+                    alix.walletAddress,
+                )
+            )
+        }
+        runBlocking { alixClient.conversations.syncGroups() }
+        val alixGroup: Group = alixClient.findGroup(boGroup.id)!!
+        val alixGroup2: Group = alixClient.findGroup(boGroup2.id)!!
+
+        assertEquals(alixGroup.messages().size, 0)
+        assertEquals(alixGroup2.messages().size, 0)
+
+        runBlocking {
+            boGroup.send("hi")
+            boGroup2.send("hi")
+            alixClient.conversations.syncAllGroups()
+        }
+
+        assertEquals(alixGroup.messages().size, 1)
+        assertEquals(alixGroup2.messages().size, 1)
+
+        runBlocking {
+            boGroup2.removeMembers(listOf(alix.walletAddress))
+            boGroup.send("hi")
+            boGroup.send("hi")
+            boGroup2.send("hi")
+            boGroup2.send("hi")
+            alixClient.conversations.syncAllGroups()
+        }
+
+        assertEquals(alixGroup.messages().size, 3)
+        assertEquals(alixGroup2.messages().size, 2)
+    }
 }

library/src/main/java/org/xmtp/android/library/Conversations.kt

@@ -187,10 +187,16 @@ data class Conversations(
         return Group(client, group)
     }
 
+    // Sync from the network the latest list of groups
     suspend fun syncGroups() {
         libXMTPConversations?.sync()
     }
 
+    // Sync all existing local groups data from the network (Note: call syncGroups() first to get the latest list of groups)
+    suspend fun syncAllGroups() {
+        libXMTPConversations?.syncAllGroups()
+    }
+
     suspend fun listGroups(
         after: Date? = null,
         before: Date? = null,