Revert "Enforce execve() restrictions for API > 28"

This reverts commit 0dd738d810532eb41ad8d90520156212ce756648.

Reason for revert: CtsSimpleperfTestCases CTS test case failures.
See b/118704604 for details.

Bug: 112357170
Bug: 118704604
Change-Id: Ibe921f3bbc3404694542ef695883c1a30777d68b
diff --git a/private/untrusted_app_all.te b/private/untrusted_app_all.te
index 527216d..54d278e 100644
--- a/private/untrusted_app_all.te
+++ b/private/untrusted_app_all.te
@@ -22,7 +22,7 @@
 
 # Some apps ship with shared libraries and binaries that they write out
 # to their sandbox directory and then execute.
-allow untrusted_app_all { app_data_file privapp_data_file }:file { r_file_perms execute };
+allow untrusted_app_all { app_data_file privapp_data_file }:file { rx_file_perms };
 
 # ASEC
 allow untrusted_app_all asec_apk_file:file r_file_perms;