emulator: allows drm hal vendor access

BUG: 76029272
Change-Id: Ib4de8b4cd5cf5899bee23c798156006d3680ab8d
diff --git a/target/board/generic/sepolicy/file_contexts b/target/board/generic/sepolicy/file_contexts
index 521c65e..c65aaec 100644
--- a/target/board/generic/sepolicy/file_contexts
+++ b/target/board/generic/sepolicy/file_contexts
@@ -33,3 +33,7 @@
 /vendor/lib(64)?/lib_renderControl_enc\.so       u:object_r:same_process_hal_file:s0
 /vendor/lib(64)?/libGLESv1_enc\.so       u:object_r:same_process_hal_file:s0
 /vendor/lib(64)?/libGLESv2_enc\.so       u:object_r:same_process_hal_file:s0
+
+# data
+/data/vendor/mediadrm(/.*)?            u:object_r:mediadrm_vendor_data_file:s0
+