liblog: __android_log_error_write in vndk

Also added log_safetynet.h header. This contains a memory sensitive logging
function which is used to detect attack attempts.

Fixes: 37442967
Test: liblog-unit-tests on internal marlin
Test: build liblog with BOARD_VNDK_VERSION := current on aosp_arm
Test: libbinder vendor variant links with BOARD_VNDK_VERSION := current

Change-Id: Icfcc2b1acbb3712bf4c84403870dc93401eafb15
diff --git a/liblog/liblog.map.txt b/liblog/liblog.map.txt
index 58fb148..3c4c1f1 100644
--- a/liblog/liblog.map.txt
+++ b/liblog/liblog.map.txt
@@ -33,6 +33,7 @@
     android_logger_get_prune_list; # vndk
     android_logger_set_prune_list; # vndk
     android_logger_get_statistics; # vndk
+    __android_log_error_write; # vndk
     __android_log_is_loggable;
 };