feat(ble): Make the adv a bit more Apple friendly

Accessory Design Guidelines for Apple Devices says that TX power should
be included in the advertisement.

Also ask for the current time service in the scan report so the card10
shows up in the system dialog.

epicardium/ble/ble_main.c

@@ -178,7 +178,11 @@ static const uint8_t bleAdvDataDisc[] =
   /*! service UUID list */
   17,
   DM_ADV_TYPE_128_UUID_PART,
-  CARD10_UUID_SUFFIX, 0x0, CARD10_UUID_PREFIX
+  CARD10_UUID_SUFFIX, 0x0, CARD10_UUID_PREFIX,
+
+  2,                                      /*! length */
+  DM_ADV_TYPE_TX_POWER,                   /*! AD type */
+  0,                                      /*! tx power */
 };
 
 /*! scan data, discoverable mode */
@@ -187,7 +191,11 @@ uint8_t bleScanDataDisc[] =
   /*! device name */
   14,                                      /*! length */
   DM_ADV_TYPE_LOCAL_NAME,                 /*! AD type */
-  'c','a','r','d','1','0','-','0','0','0','0','0','0'
+  'c','a','r','d','1','0','-','0','0','0','0','0','0',
+
+  3,                                      /*! length */
+  DM_ADV_TYPE_16_SOLICIT,                 /*! AD type */
+  UINT16_TO_BYTES(ATT_UUID_CURRENT_TIME_SERVICE),
 };
 
 /*! advertising data, connectable mode */