Rename data/pkg_staging to data/app-staging

Test: n/a
Bug: 126330086

Change-Id: I34d5085d8e6546d77cc854e27ca849462d482396
Merged-In: I34d5085d8e6546d77cc854e27ca849462d482396
diff --git a/private/file_contexts b/private/file_contexts
index ac0a083..3f5c3a0 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -456,7 +456,7 @@
 /data/preloads/media(/.*)?	u:object_r:preloads_media_file:s0
 /data/preloads/demo(/.*)?	u:object_r:preloads_media_file:s0
 /data/server_configurable_flags(/.*)? u:object_r:server_configurable_flags_data_file:s0
-/data/pkg_staging(/.*)?		u:object_r:staging_data_file:s0
+/data/app-staging(/.*)?		u:object_r:staging_data_file:s0
 
 # Misc data
 /data/misc/adb(/.*)?            u:object_r:adb_keys_file:s0