lighting: dynamic-only lights so no lighting build is required

The editor warned 'LIGHTING NEEDS TO BE REBUILT' (Build Lighting Only /
BuildLighting) because the sun and sky were Stationary with no baked lightmap.
The demo is a fixed daytime scene lit entirely dynamically, so:

- Config/DefaultEngine.ini: r.AllowStaticLighting=False - nothing to build.
- DemoMap + ReviewMap builders: sun, sky light, height fog and the staged
  mesh components are set to ComponentMobility.MOVABLE.

Also clears the Android File Server SecurityToken in DefaultEngine.ini: the
plugin is disabled and excluded from shipping, and the value is a credential
that must not be committed.

All 14 screenshots re-rendered; no lighting warnings in the build or run logs.

Tools/ue_build_review_map.py

@@ -96,11 +96,28 @@ try:
         else:
             log("floor spawn failed")
 
-    if spawn(unreal.DirectionalLight, unreal.Vector(0, 0, 900), "RenderKeyLight",
-             rot=unreal.Rotator(pitch=-38.0, yaw=35.0, roll=0.0)):
-        log("staged: DirectionalLight")
-    if spawn(unreal.SkyLight, unreal.Vector(0, 0, 1200), "RenderFillSky"):
-        log("staged: SkyLight")
+    # Lights are Movable and the project disables static lighting
+    # (r.AllowStaticLighting=False), so no baked lighting build is needed and
+    # the editor stops asking to rebuild lighting.
+    sun = spawn(unreal.DirectionalLight, unreal.Vector(0, 0, 900), "RenderKeyLight",
+                rot=unreal.Rotator(pitch=-38.0, yaw=35.0, roll=0.0))
+    if sun:
+        comp = sun.get_component_by_class(unreal.DirectionalLightComponent)
+        if comp:
+            try:
+                comp.set_mobility(unreal.ComponentMobility.MOVABLE)
+            except Exception as exc:  # noqa: BLE001
+                log(f"key light mobility not set: {exc!r}")
+        log("staged: DirectionalLight (movable)")
+    sky = spawn(unreal.SkyLight, unreal.Vector(0, 0, 1200), "RenderFillSky")
+    if sky:
+        comp = sky.get_component_by_class(unreal.SkyLightComponent)
+        if comp:
+            try:
+                comp.set_mobility(unreal.ComponentMobility.MOVABLE)
+            except Exception as exc:  # noqa: BLE001
+                log(f"fill sky mobility not set: {exc!r}")
+        log("staged: SkyLight (movable)")
     if spawn(unreal.SkyAtmosphere, unreal.Vector(0, 0, 0), "RenderSky"):
         log("staged: SkyAtmosphere")