Android: Remove unused accelerometer-related code and definitions

That also covers removal of the call `SDLActivity.onNativeAccel`,
plus a change of comment under SDL_android.c.

Definitions were previously used while an accelerometer could be listed as a joystick.

android-project/app/src/main/java/org/libsdl/app/SDLActivity.java

@@ -1103,7 +1103,6 @@ public class SDLActivity extends Activity implements View.OnSystemUiVisibilityCh
                                             int action, float x,
                                             float y, float p);
     public static native void onNativePen(int penId, int device_type, int button, int action, float x, float y, float p);
-    public static native void onNativeAccel(float x, float y, float z);
     public static native void onNativeClipboardChanged();
     public static native void onNativeSurfaceCreated();
     public static native void onNativeSurfaceChanged();

android-project/app/src/main/java/org/libsdl/app/SDLSurface.java

@@ -379,12 +379,6 @@ public class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
                 SDLActivity.mCurrentRotation = newRotation;
                 SDLActivity.onNativeRotationChanged(newRotation);
             }
-
-            SDLActivity.onNativeAccel(-x / SensorManager.GRAVITY_EARTH,
-                                      y / SensorManager.GRAVITY_EARTH,
-                                      event.values[2] / SensorManager.GRAVITY_EARTH);
-
-
         }
     }
 

src/core/android/SDL_android.c

@@ -140,10 +140,6 @@ JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativePen)(
     JNIEnv *env, jclass jcls,
     jint pen_id_in, jint device_type, jint button, jint action, jfloat x, jfloat y, jfloat p);
 
-JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeAccel)(
-    JNIEnv *env, jclass jcls,
-    jfloat x, jfloat y, jfloat z);
-
 JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeClipboardChanged)(
     JNIEnv *env, jclass jcls);
 
@@ -237,7 +233,6 @@ static JNINativeMethod SDLActivity_tab[] = {
     { "onNativePinchEnd", "()V", SDL_JAVA_INTERFACE(onNativePinchEnd) },
     { "onNativeMouse", "(IIFFZ)V", SDL_JAVA_INTERFACE(onNativeMouse) },
     { "onNativePen", "(IIIIFFF)V", SDL_JAVA_INTERFACE(onNativePen) },
-    { "onNativeAccel", "(FFF)V", SDL_JAVA_INTERFACE(onNativeAccel) },
     { "onNativeClipboardChanged", "()V", SDL_JAVA_INTERFACE(onNativeClipboardChanged) },
     { "nativeLowMemory", "()V", SDL_JAVA_INTERFACE(nativeLowMemory) },
     { "onNativeLocaleChanged", "()V", SDL_JAVA_INTERFACE(onNativeLocaleChanged) },
@@ -420,11 +415,9 @@ static jmethodID midHapticRun;
 static jmethodID midHapticRumble;
 static jmethodID midHapticStop;
 
-// Accelerometer data storage
+// display orientation
 static SDL_DisplayOrientation displayNaturalOrientation;
 static SDL_DisplayOrientation displayCurrentOrientation;
-static float fLastAccelerometer[3];
-static bool bHasNewData;
 
 static bool bHasEnvironmentVariables;
 
@@ -1476,17 +1469,6 @@ JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativePen)(
     SDL_UnlockMutex(Android_ActivityMutex);
 }
 
-// Accelerometer
-JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeAccel)(
-    JNIEnv *env, jclass jcls,
-    jfloat x, jfloat y, jfloat z)
-{
-    fLastAccelerometer[0] = x;
-    fLastAccelerometer[1] = y;
-    fLastAccelerometer[2] = z;
-    bHasNewData = true;
-}
-
 // Clipboard
 JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeClipboardChanged)(
     JNIEnv *env, jclass jcls)
@@ -1762,22 +1744,6 @@ bool Android_JNI_ShouldMinimizeOnFocusLoss(void)
     return (*env)->CallStaticBooleanMethod(env, mActivityClass, midShouldMinimizeOnFocusLoss);
 }
 
-bool Android_JNI_GetAccelerometerValues(float values[3])
-{
-    bool result = false;
-
-    if (bHasNewData) {
-        int i;
-        for (i = 0; i < 3; ++i) {
-            values[i] = fLastAccelerometer[i];
-        }
-        bHasNewData = false;
-        result = true;
-    }
-
-    return result;
-}
-
 /*
  * Audio support
  */

src/core/android/SDL_android.h

@@ -64,7 +64,6 @@ extern void Android_JNI_SetOrientation(int w, int h, int resizable, const char *
 extern void Android_JNI_MinimizeWindow(void);
 extern bool Android_JNI_ShouldMinimizeOnFocusLoss(void);
 
-extern bool Android_JNI_GetAccelerometerValues(float values[3]);
 extern void Android_JNI_ShowScreenKeyboard(int input_type, SDL_Rect *inputRect);
 extern void Android_JNI_HideScreenKeyboard(void);
 extern ANativeWindow *Android_JNI_GetNativeWindow(void);