Add a message if adb couldn't be found, reduce windows error spam

renderdoc/android/android_tools.cpp

@@ -331,6 +331,16 @@ void initAdb()
   if(adb.find('/') != std::string::npos || adb.find('\\') != std::string::npos)
     workdir = get_dirname(adb);
 
+  RDCLOG("Initialising adb using '%s'", adb.c_str());
+
+  if(adb.empty() || !FileIO::exists(adb.c_str()) || !FileIO::exists((adb + ".exe").c_str()))
+  {
+    if(FileIO::FindFileInPath(adb.c_str()) == "")
+      RDCWARN(
+          "Couldn't locate adb. Ensure adb is in PATH, ANDROID_SDK or ANDROID_HOME is set, or you "
+          "configure your SDK location");
+  }
+
   Process::LaunchProcess(adb.c_str(), workdir.c_str(), "start-server", true);
 }
 void shutdownAdb()

renderdoc/os/win32/win32_process.cpp

@@ -556,7 +556,8 @@ static PROCESS_INFORMATION RunProcess(const char *app, const char *workingDir, c
 
   if(!retValue)
   {
-    RDCWARN("Process %s could not be loaded.", app);
+    if(!internal)
+      RDCWARN("Process %s could not be loaded.", app);
     CloseHandle(pi.hProcess);
     CloseHandle(pi.hThread);
     RDCEraseEl(pi);
@@ -1003,7 +1004,8 @@ uint32_t Process::LaunchProcess(const char *app, const char *workingDir, const c
 
   if(pi.dwProcessId == 0)
   {
-    RDCWARN("Couldn't launch process '%s'", app);
+    if(!internal)
+      RDCWARN("Couldn't launch process '%s'", app);
     return 0;
   }