Add -read-only flag to prevent AVD lock conflicts

templates/start.sh

@@ -14,7 +14,7 @@ if [ -z "$adb_server_port" ]; then
   adb_server_port="5037"
 fi
 if [ -z "$emulator_opts" ]; then
-  emulator_opts="-screen multi-touch -no-boot-anim -noaudio -no-window -gpu swiftshader_indirect -camera-back none -camera-front none -skip-adb-auth -no-snapshot-save"
+  emulator_opts="-screen multi-touch -no-boot-anim -noaudio -no-window -gpu swiftshader_indirect -camera-back none -camera-front none -skip-adb-auth -no-snapshot-save -read-only"
 fi
 
 # Detect ip and forward ADB ports outside to outside interface