Make adb_device_loop return if no devices

build/android/adb_device_functions.sh

Index: build/android/adb_device_functions.sh
diff --git a/build/android/adb_device_functions.sh b/build/android/adb_device_functions.sh
index a8a0c8f56421218bb80c2d18039072ff1d88052f..66cc32fc4e398b03f605dcae9abfbb913c125891 100755
--- a/build/android/adb_device_functions.sh
+++ b/build/android/adb_device_functions.sh
@@ -42,7 +42,10 @@ adb_device_loop() {
         'adb shell cat /data/local.prop)"'
     return 1
   fi
-  local DEVICES=$(adb_get_devices -b)
+  local DEVICES=$(adb_get_devices)
+  if [[ -z $DEVICES ]]; then
+    return
+  fi
   # Do not change DEVICE variable name - part of api
   for DEVICE in $DEVICES; do
     DEV_TYPE=$(adb -s $DEVICE shell getprop ro.product.device | sed 's/\r//')