Replace usage of "vector<>" with "std::vector<>"

This change is needed so we can remove the last instances
of "using std::vector" statements in hardware/libhardware.

Test: code compilation
Change-Id: Id728867f6b2e154a01ef56bda93d48def71b0e47
diff --git a/include/hardware/bt_gatt_client.h b/include/hardware/bt_gatt_client.h
index 6c5a85e..4322852 100644
--- a/include/hardware/bt_gatt_client.h
+++ b/include/hardware/bt_gatt_client.h
@@ -23,8 +23,6 @@
 #include "bt_gatt_types.h"
 #include "bt_common_types.h"
 
-using std::vector;
-
 __BEGIN_DECLS
 
 /**
@@ -238,14 +236,14 @@
     /** Write a remote characteristic */
     bt_status_t (*write_characteristic)(int conn_id, uint16_t handle,
                     int write_type, int auth_req,
-                    vector<uint8_t> value);
+                    std::vector<uint8_t> value);
 
     /** Read the descriptor for a given characteristic */
     bt_status_t (*read_descriptor)(int conn_id, uint16_t handle, int auth_req);
 
     /** Write a remote descriptor for a given characteristic */
     bt_status_t (*write_descriptor)( int conn_id, uint16_t handle,
-                    int auth_req, vector<uint8_t> value);
+                                     int auth_req, std::vector<uint8_t> value);
 
     /** Execute a prepared write operation */
     bt_status_t (*execute_write)(int conn_id, int execute);