DrmStatus: refactor string ctor

Bug: 249941041
Test: MediaDrmParameterizedTests
Change-Id: Id87719324c06f99ee16807e73e4d42f40eb83275
diff --git a/drm/libmediadrm/Android.bp b/drm/libmediadrm/Android.bp
index 1667d5b..1e1a49d 100644
--- a/drm/libmediadrm/Android.bp
+++ b/drm/libmediadrm/Android.bp
@@ -35,6 +35,7 @@
         "CryptoHalAidl.cpp",
         "DrmUtils.cpp",
         "DrmHalListener.cpp",
+        "DrmStatus.cpp",
     ],
 
     local_include_dirs: [