rust: Use new common image mutator interface.

Refactor rust to use and implement the new common image mutator
interface to handle future image mutations.

Bug: 184042776
Test: m nothing
Change-Id: If6a85e2b8c6a1969d62264eaea6c6b53cae9c039
diff --git a/rust/testing.go b/rust/testing.go
index 75adcfc..09c627f 100644
--- a/rust/testing.go
+++ b/rust/testing.go
@@ -150,7 +150,7 @@
 			host_supported: true,
 			vendor_available: true,
 			vendor_ramdisk_available: true,
-                        native_coverage: false,
+			native_coverage: false,
 			sysroot: true,
 			apex_available: ["//apex_available:platform", "//apex_available:anyapex"],
 			min_sdk_version: "29",
@@ -163,7 +163,7 @@
 			host_supported: true,
 			vendor_available: true,
 			vendor_ramdisk_available: true,
-                        native_coverage: false,
+			native_coverage: false,
 			sysroot: true,
 			apex_available: ["//apex_available:platform", "//apex_available:anyapex"],
 			min_sdk_version: "29",