Platform: hide AndroidApplication::Flags from the header.

Like in all other applications.

src/Magnum/Platform/AndroidApplication.cpp

@@ -41,6 +41,10 @@ extern "C" void ANativeActivity_onCreate(struct ANativeActivity*, void*, size_t)
 
 namespace Magnum { namespace Platform {
 
+enum class AndroidApplication::Flag: UnsignedByte {
+    Redraw = 1 << 0
+};
+
 struct AndroidApplication::LogOutput {
     LogOutput();
 
@@ -175,6 +179,10 @@ void AndroidApplication::swapBuffers() {
     eglSwapBuffers(_display, _surface);
 }
 
+void AndroidApplication::redraw() {
+    _flags |= Flag::Redraw;
+}
+
 void AndroidApplication::viewportEvent(ViewportEvent& event) {
     static_cast<void>(event);
 }

src/Magnum/Platform/AndroidApplication.h

@@ -346,7 +346,7 @@ class AndroidApplication {
         void swapBuffers();
 
         /** @copydoc Sdl2Application::redraw() */
-        void redraw() { _flags |= Flag::Redraw; }
+        void redraw();
 
     private:
         /**
@@ -421,9 +421,7 @@ class AndroidApplication {
     private:
         struct LogOutput;
 
-        enum class Flag: UnsignedByte {
-            Redraw = 1 << 0
-        };
+        enum class Flag: UnsignedByte;
         typedef Containers::EnumSet<Flag> Flags;
 
         static void commandEvent(android_app* state, std::int32_t cmd);