feat: add protos and bump version

app/build.gradle

@@ -153,8 +153,8 @@ dependencies {
     testImplementation 'org.robolectric:shadows-multidex:4.4'
 }
 
-def canonicalVersionCode = 218
-def canonicalVersionName = "1.11.8"
+def canonicalVersionCode = 220
+def canonicalVersionName = "1.11.9"
 
 def postFixSize = 10
 def abiPostFix = ['armeabi-v7a' : 1,

libsignal/protobuf/SignalService.proto

@@ -44,6 +44,7 @@ message UnsendRequest {
 
 message Content {
   optional DataMessage                dataMessage                = 1;
+  optional CallMessage                callMessage                = 3;
   optional ReceiptMessage             receiptMessage             = 5;
   optional TypingMessage              typingMessage              = 6;
   optional ConfigurationMessage       configurationMessage       = 7;
@@ -161,6 +162,21 @@ message DataMessage {
   optional string                    syncTarget                = 105;
 }
 
+message CallMessage {
+
+  enum Type {
+    OFFER              = 1;
+    ANSWER             = 2;
+    PROVISIONAL_ANSWER = 3;
+  }
+
+  // @required
+  required Type type  = 1;
+  // @required
+  required string sdp = 2;
+
+}
+
 message ConfigurationMessage {
 
   message ClosedGroup {