Some more build fixes

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Framework/GridMate/Platform/Android/GridMate/Carrier/Utils_Android.cpp

@@ -18,9 +18,9 @@
 
 namespace GridMate
 {
-    string Utils::GetMachineAddress(int familyType)
+    AZStd::string Utils::GetMachineAddress(int familyType)
     {
-        string machineName;
+        AZStd::string machineName;
         struct RTMRequest
         {
             nlmsghdr m_msghdr;

Code/Framework/GridMate/Platform/Linux/GridMate/Session/LANSession_Linux.cpp

@@ -8,6 +8,8 @@
 
 #include <unistd.h>
 
+#include <AzCore/std/string/string.h>
+
 namespace GridMate
 {
     namespace Platform

Code/Framework/GridMate/Platform/Mac/GridMate/Session/LANSession_Mac.cpp

@@ -8,6 +8,8 @@
 
 #include <unistd.h>
 
+#include <AzCore/std/string/string.h>
+
 namespace GridMate
 {
     namespace Platform

Code/Legacy/CrySystem/LocalizedStringManager.cpp

@@ -2337,8 +2337,8 @@ void InternalFormatStringMessage(AZStd::string& outString, const AZStd::string&
     static const char tokens2[3] = { token, token, '\0' };
 
     int maxArgUsed = 0;
-    int lastPos = 0;
-    int curPos = 0;
+    size_t lastPos = 0;
+    size_t curPos = 0;
     const int sourceLen = static_cast<int>(sString.length());
     while (true)
     {