Add free view and a separate cyberspace action set

- Free view: hold a mapped input (default: left grip) and that thumbstick
  drives the engine's mouse look, with the stick's normal bindings suspended
  while held. Also available for the right stick, unbound by default.
- Cyberspace actions: eleven thrust/climb/dive/bank/roll actions with their
  own bindings, active only in cyberspace. The normal movement actions are
  inactive there, and capture exclusivity only compares actions that can be
  active together, so one input can be bound in both sets.
- Cyberspace pitch and bank scale with thumbstick deflection instead of
  running at full strength.
- Remove the toggle_freelook action; bind the automap view to the right
  stick click by default.
- Engine patches: 24 exposes whether the player is in cyberspace, 25 lets
  the controller code scale cyberspace pitch and bank.

android/engine-patches/24-android-cyberspace-query.patch

@@ -0,0 +1,13 @@
+--- a/src/GameSrc/mouselook.c
++++ b/src/GameSrc/mouselook.c
+@@ -121,3 +121,10 @@
+         get_mouselook_vel(&mvelx, &mvely);
+     }
+ }
++
++#ifdef __ANDROID__
++// Whether the player is currently in cyberspace; read by the Android
++// controller input code (android/app/src/main/cpp/xr_input.c) to switch
++// between the normal and cyberspace action sets.
++int qs_in_cyberspace(void) { return global_fullmap != NULL && global_fullmap->cyber; }
++#endif