Modified security policy to allow user to get their own icon.

BUG: 27583869
Change-Id: I0a25bd03f3998d48dba355b91140611e38ce7b0d

app.te

@@ -107,6 +107,9 @@ allow appdomain ringtone_file:file { getattr read write };
 # Read ShortcutManager icon files (opened by system).
 allow appdomain shortcut_manager_icons:file { getattr read };
 
+# Read icon file (opened by system).
+allow appdomain icon_file:file { getattr read };
+
 # Write to /data/anr/traces.txt.
 allow appdomain anr_data_file:dir search;
 allow appdomain anr_data_file:file { open append };

file.te

@@ -170,6 +170,8 @@ type efs_file, file_type;
 type wallpaper_file, file_type, data_file_type, mlstrustedobject;
 # Type for shortcut manager icon file.
 type shortcut_manager_icons, file_type, data_file_type, mlstrustedobject;
+# Type for user icon file.
+type icon_file, file_type, data_file_type;
 # /mnt/asec
 type asec_apk_file, file_type, data_file_type, mlstrustedobject;
 # Elements of asec files (/mnt/asec) that are world readable

file_contexts

@@ -334,6 +334,9 @@
 #   /data/system_ce/0/shortcut_service/bitmaps/com.example.app/1457472879282.png
 /data/system_ce/[0-9]+/shortcut_service/bitmaps(/.*)? u:object_r:shortcut_manager_icons:s0
 
+# User icon files
+/data/system/users/[0-9]+/photo.png             u:object_r:icon_file:s0
+
 #############################
 # efs files
 #

platform_app.te

@@ -11,6 +11,7 @@ bluetooth_domain(platform_app)
 # Read from /data/local/tmp or /data/data/com.android.shell.
 allow platform_app shell_data_file:dir search;
 allow platform_app shell_data_file:file { open getattr read };
+allow platform_app icon_file:file { open getattr read };
 # Populate /data/app/vmdl*.tmp, /data/app-private/vmdl*.tmp files
 # created by system server.
 allow platform_app { apk_tmp_file apk_private_tmp_file }:dir rw_dir_perms;

system_app.te

@@ -22,6 +22,9 @@ allow system_app mnt_media_rw_file:dir search;
 # Read wallpaper file.
 allow system_app wallpaper_file:file r_file_perms;
 
+# Read icon file.
+allow system_app icon_file:file r_file_perms;
+
 # Write to properties
 set_prop(system_app, debug_prop)
 set_prop(system_app, system_prop)

system_server.te

@@ -310,6 +310,10 @@ allow system_server shortcut_manager_icons:file create_file_perms;
 allow system_server ringtone_file:dir { create_dir_perms relabelto };
 allow system_server ringtone_file:file create_file_perms;
 
+# Relabel icon file.
+allow system_server icon_file:file relabelto;
+allow system_server icon_file:file { rw_file_perms unlink };
+
 # FingerprintService.java does a restorecon of the directory /data/system/users/[0-9]+/fpdata(/.*)?
 allow system_server system_data_file:dir relabelfrom;