Extra logging around bta dm service discovery

Bug: 255848788
Test: analyze logs, try to understand what the heck bta dm is doing
Change-Id: Ibaefca94554419ffe11a2bf370654f8a2ada8f8b

system/bta/dm/bta_dm_act.cc

@@ -924,6 +924,10 @@ void bta_dm_discover(tBTA_DM_MSG* p_data) {
   bta_dm_search_cb.transport = p_data->discover.transport;
 
   bta_dm_search_cb.name_discover_done = false;
+
+  LOG_INFO("bta_dm_discovery: starting service discovery to %s , transport: %s",
+           PRIVATE_ADDRESS(p_data->discover.bd_addr),
+           bt_transport_text(p_data->discover.transport).c_str());
   bta_dm_discover_device(p_data->discover.bd_addr);
 }
 
@@ -1512,6 +1516,9 @@ void bta_dm_queue_disc(tBTA_DM_MSG* p_data) {
   tBTA_DM_MSG* p_pending_discovery =
       (tBTA_DM_MSG*)osi_malloc(sizeof(tBTA_DM_API_DISCOVER));
   memcpy(p_pending_discovery, p_data, sizeof(tBTA_DM_API_DISCOVER));
+
+  LOG_INFO("bta_dm_discovery: queuing service discovery to %s",
+           p_pending_discovery->discover.bd_addr.ToString().c_str());
   fixed_queue_enqueue(bta_dm_search_cb.pending_discovery_queue,
                       p_pending_discovery);
 }
@@ -1804,6 +1811,8 @@ static void bta_dm_discover_device(const RawAddress& remote_bd_addr) {
 
       if (transport == BT_TRANSPORT_LE) {
         if (bta_dm_search_cb.services_to_search & BTA_BLE_SERVICE_MASK) {
+          LOG_INFO("bta_dm_discovery: starting GATT discovery on %s",
+                   PRIVATE_ADDRESS(bta_dm_search_cb.peer_bdaddr));
           // set the raw data buffer here
           memset(g_disc_raw_data_buf, 0, sizeof(g_disc_raw_data_buf));
           /* start GATT for service discovery */
@@ -1811,6 +1820,8 @@ static void bta_dm_discover_device(const RawAddress& remote_bd_addr) {
           return;
         }
       } else {
+        LOG_INFO("bta_dm_discovery: starting SDP discovery on %s",
+                 PRIVATE_ADDRESS(bta_dm_search_cb.peer_bdaddr));
         bta_dm_search_cb.sdp_results = false;
         bta_dm_find_services(bta_dm_search_cb.peer_bdaddr);
         return;