Adding minSpanX and minSpanY for all the launcher widgets

Bug: 22353460
Change-Id: Id4450dee42a83e4603dcd56e1c4dec2b0e405858
diff --git a/protos/backup.proto b/protos/backup.proto
index 09330ee..d8d94e8 100644
--- a/protos/backup.proto
+++ b/protos/backup.proto
@@ -102,17 +102,17 @@
   optional string iconResource = 17;
   optional bytes icon = 18;
   optional TargetType targetType = 19 [default = TARGET_NONE];
- }
+}
 
 message Screen {
   required int64 id = 1;
   optional int32 rank = 2;
- }
+}
 
 message Resource {
   required int32 dpi = 1;
   required bytes data = 2;
- }
+}
 
 message Widget {
   required string provider = 1;
@@ -120,4 +120,8 @@
   optional bool configure = 3;
   optional Resource icon = 4;
   optional Resource preview = 5;
- }
+
+  // Assume that a widget is resizable upto 2x2 if no data is available
+  optional int32 minSpanX = 6 [default = 2];
+  optional int32 minSpanY = 7 [default = 2];
+}