Include IMGDIFF operation in minor version 4 or up.
Try imgdiff if both source and target contains gzip.
Test: unit test & generated a payload with boot.img
Bug: 26675118
(cherry picked from commit 55c4f9ba7f5c59e3345f2c1869464433ffa8dc2b)
Change-Id: I65a9f61efdc286bd48eff6ddd99826b6bf8af25f
diff --git a/payload_consumer/payload_constants.cc b/payload_consumer/payload_constants.cc
index e47b4f8..3d78e0a 100644
--- a/payload_consumer/payload_constants.cc
+++ b/payload_consumer/payload_constants.cc
@@ -25,6 +25,7 @@
const uint32_t kInPlaceMinorPayloadVersion = 1;
const uint32_t kSourceMinorPayloadVersion = 2;
const uint32_t kOpSrcHashMinorPayloadVersion = 3;
+const uint32_t kImgdiffMinorPayloadVersion = 4;
const char kLegacyPartitionNameKernel[] = "boot";
const char kLegacyPartitionNameRoot[] = "system";