Create telephony.ril.silent_reset system_ext property for RILD restart

RILD listens for changes to this property. If the value changes to 1,
RILD will restart itself and set this property back to 0.

The TelephonyGoogle app will set this property to 1 when it receives a
request from the SCONE app. Since TelephonyGoogle runs in the
com.android.phone process, we also need to give the radio domain
permission to set the telephony.ril.silent_reset property.

Bug: 286476107
Test: manual
Change-Id: I9f41aab747c075dd3a20d66f011e10ffee5a7608

system_ext/private/property_contexts

@@ -9,3 +9,6 @@ persist.bootanim.color4     u:object_r:bootanim_system_prop:s0     exact    int
 
 # Properties for euicc
 persist.modem.esim_profiles_exist            u:object_r:esim_modem_prop:s0    exact    string
+
+# Telephony
+telephony.ril.silent_reset    u:object_r:telephony_ril_prop:s0    exact    bool

system_ext/public/property.te

@@ -3,3 +3,10 @@ system_vendor_config_prop(fingerprint_ghbm_prop)
 
 # eSIM properties
 system_vendor_config_prop(esim_modem_prop)
+
+# Telephony
+system_public_prop(telephony_ril_prop)
+
+userdebug_or_eng(`
+  set_prop(shell, telephony_ril_prop)
+')

whitechapel/vendor/google/radio.te

@@ -1,3 +1,5 @@
+set_prop(radio, telephony_ril_prop)
+
 allow radio hal_exynos_rild_hwservice:hwservice_manager find;
 allow radio proc_vendor_sched:dir r_dir_perms;
 allow radio proc_vendor_sched:file w_file_perms;

whitechapel/vendor/google/rild.te

@@ -7,6 +7,8 @@ set_prop(rild, vendor_sys_default_prop)
 get_prop(rild, sota_prop)
 get_prop(rild, system_boot_reason_prop)
 
+set_prop(rild, telephony_ril_prop)
+
 allow rild proc_net:file rw_file_perms;
 allow rild radio_vendor_data_file:dir create_dir_perms;
 allow rild radio_vendor_data_file:file create_file_perms;