Implement issue #1780928: Need support hiding nav keys.

This implements support for devices whose hardware can hide
their navigation keys.  It works much like the existing keyboardHidden
configuration, and for compatibility uses the same configuration
change bit.

Also add FLAG_TURN_ON_SCREEN for windows, which has the system
cause the screen to be turned on when the window is displayed.
Great fun when used with FLAG_SHOW_WHEN_LOCKED!

Change-Id: I0b867f19af85cfd8786a14cea194b34f7bdd9b7a
diff --git a/include/utils/ResourceTypes.h b/include/utils/ResourceTypes.h
index e524e2a..17ccad6 100644
--- a/include/utils/ResourceTypes.h
+++ b/include/utils/ResourceTypes.h
@@ -864,6 +864,13 @@
         KEYSHIDDEN_SOFT = 0x0003,
     };
     
+    enum {
+        MASK_NAVHIDDEN = 0x000c,
+        NAVHIDDEN_ANY = 0x0000,
+        NAVHIDDEN_NO = 0x0004,
+        NAVHIDDEN_YES = 0x0008,
+    };
+    
     union {
         struct {
             uint8_t keyboard;
@@ -1011,7 +1018,8 @@
         if (orientation != o.orientation) diffs |= CONFIG_ORIENTATION;
         if (density != o.density) diffs |= CONFIG_DENSITY;
         if (touchscreen != o.touchscreen) diffs |= CONFIG_TOUCHSCREEN;
-        if (((inputFlags^o.inputFlags)&MASK_KEYSHIDDEN) != 0) diffs |= CONFIG_KEYBOARD_HIDDEN;
+        if (((inputFlags^o.inputFlags)&(MASK_KEYSHIDDEN|MASK_NAVHIDDEN)) != 0)
+                diffs |= CONFIG_KEYBOARD_HIDDEN;
         if (keyboard != o.keyboard) diffs |= CONFIG_KEYBOARD;
         if (navigation != o.navigation) diffs |= CONFIG_NAVIGATION;
         if (screenSize != o.screenSize) diffs |= CONFIG_SCREEN_SIZE;
@@ -1082,6 +1090,11 @@
                 if (!(o.inputFlags & MASK_KEYSHIDDEN)) return true;
             }
 
+            if (((inputFlags^o.inputFlags) & MASK_NAVHIDDEN) != 0) {
+                if (!(inputFlags & MASK_NAVHIDDEN)) return false;
+                if (!(o.inputFlags & MASK_NAVHIDDEN)) return true;
+            }
+
             if (keyboard != o.keyboard) {
                 if (!keyboard) return false;
                 if (!o.keyboard) return true;
@@ -1225,6 +1238,18 @@
                     }
                 }
 
+                const int navHidden = inputFlags & MASK_NAVHIDDEN;
+                const int oNavHidden = o.inputFlags & MASK_NAVHIDDEN;
+                if (navHidden != oNavHidden) {
+                    const int reqNavHidden =
+                            requested->inputFlags & MASK_NAVHIDDEN;
+                    if (reqNavHidden) {
+
+                        if (!navHidden) return false;
+                        if (!oNavHidden) return true;
+                    }
+                }
+
                 if ((keyboard != o.keyboard) && requested->keyboard) {
                     return (keyboard);
                 }
@@ -1332,6 +1357,12 @@
                     return false;
                 }
             }
+            const int navHidden = inputFlags&MASK_NAVHIDDEN;
+            const int setNavHidden = settings.inputFlags&MASK_NAVHIDDEN;
+            if (setNavHidden != 0 && navHidden != 0
+                && navHidden != setNavHidden) {
+                return false;
+            }
             if (settings.keyboard != 0 && keyboard != 0
                 && keyboard != settings.keyboard) {
                 return false;