Add AID_READPROC to supplementary groups for /proc visibility

Author: nitanmarcel

android_ids.h

@@ -4,6 +4,7 @@
 #define AID_SYSTEM 1000
 #define AID_SHELL 2000
 #define AID_PACKAGE_INFO 1032
+#define AID_READPROC 3009
 #define AID_APP_START 10000
 #define AID_SHARED_GID_START 50000
 #define AID_USER_OFFSET 100000

jrunas.cpp

@@ -77,6 +77,7 @@ static std::vector<gid_t> get_supplementary_gids(uid_t userAppId) {
   gid_t shared_app_gid =
       userAppId % AID_USER_OFFSET - AID_APP_START + AID_SHARED_GID_START;
   gids.push_back(shared_app_gid);
+  gids.push_back(AID_READPROC);
   return gids;
 }