Revert^2 "Add qemu.hw.mainkeys to system property_contexts"

509b35e5d9b72f725d17fab35ecb11b9b706a399

Bug: 180412668
Merged-In: I4067bba36613fa41e3c7a085da76cda4784753ad
Change-Id: I4067bba36613fa41e3c7a085da76cda4784753ad
diff --git a/private/platform_app.te b/private/platform_app.te
index 7bf14c8..a112081 100644
--- a/private/platform_app.te
+++ b/private/platform_app.te
@@ -90,6 +90,9 @@
 # allow platform apps to read keyguard.no_require_sim
 get_prop(platform_app, keyguard_config_prop)
 
+# allow platform apps to read qemu.hw.mainkeys
+get_prop(platform_app, qemu_hw_prop)
+
 # allow platform apps to create symbolic link
 allow platform_app app_data_file:lnk_file create_file_perms;