Revert "Apply dev keys for signing widevine apex"

This reverts commit 33796a29cf.

Reason for revert: PDK BB
Bug: 248436066
Change-Id: Ib0073f96e7b0326898b2384ea4279833211b1ff0

libwvdrmengine/apex/Android.bp

@@ -55,8 +55,8 @@ apex {
     vintf_fragments: ["com.google.android.widevine.xml"],
     file_contexts: "file_contexts",
     use_vndk_as_stable: true,
-    key: "com_google_android_widevine-image.key",
-    certificate: ":com_google_android_widevine-container",
+    key: "com.google.android.widevine.key",
+    certificate: ":com.google.android.widevine.certificate",
     updatable: false,
 }