Quote ANDROID_EMULATOR_TIMEOUT for shellcheck

Author: marcprux

.github/workflows/scripts/android/android-emulator-tests.sh

@@ -94,7 +94,7 @@ log "Starting Android emulator"
 nohup emulator -no-metrics -partition-size 1024 -memory 4096 -wipe-data -no-window -no-snapshot -noaudio -no-boot-anim -avd "${ANDROID_EMULATOR_NAME}" &
 
 log "Waiting for Android emulator startup"
-timeout ${ANDROID_EMULATOR_TIMEOUT} adb wait-for-any-device
+timeout "${ANDROID_EMULATOR_TIMEOUT}" adb wait-for-any-device
 
 log "Prepare Swift test package"
 # create a staging folder where we copy the test executable