Use View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR API now that it's available
b/38431856

Change-Id: I6a5cc835f2d14661a312e30057ae88fe2e1f23fa
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 4be25bb..17d401c 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -499,9 +499,6 @@
         }
     }
 
-    // TODO: use platform flag on API >= 26
-    private static final int SYSTEM_UI_FLAG_LIGHT_NAV_BAR = 0x10;
-
     /**
      * Sets the status and/or nav bar to be light or not. Light status bar means dark icons.
      * @param isLight make sure the system bar is light.
@@ -516,14 +513,14 @@
                 newSystemUiFlags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
             }
             if (navBar && Utilities.isAtLeastO()) {
-                newSystemUiFlags |= SYSTEM_UI_FLAG_LIGHT_NAV_BAR;
+                newSystemUiFlags |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR;
             }
         } else {
             if (statusBar) {
                 newSystemUiFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
             }
             if (navBar && Utilities.isAtLeastO()) {
-                newSystemUiFlags &= ~(SYSTEM_UI_FLAG_LIGHT_NAV_BAR);
+                newSystemUiFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
             }
         }