Add missing dependencies to releasetools_common and binary defaults.

When GetBootImageBuildProp is moved to common, its dependencies
(toybox, lz4 and unpack_bootimg) aren't moved accordingly.
Copy the dependencies over.

Test: pass
Change-Id: Iaa8f41ae0109e8eb1c058ecd7dd854bb7de9391a

tools/releasetools/Android.bp

@@ -219,6 +219,8 @@ python_library_host {
         "lz4",
         "mkbootfs",
         "signapk",
+        "toybox",
+        "unpack_bootimg",
     ],
 }
 
@@ -279,6 +281,8 @@ python_defaults {
         "lz4",
         "mkbootfs",
         "signapk",
+        "toybox",
+        "unpack_bootimg",
     ],
 }