androidsurface: ensure pitch % 16 == 0

Some devices (like Samsung Exynos) will not align pitch to 16 bytes.
Thus we need to align the hardware width ourselves.

Note that this needs to be accounted for in the JNI support code.

modules/video_output/androidsurface.c

@@ -337,9 +337,12 @@ static int  AndroidLockSurface(picture_t *picture) {
     else
         sys->s_lock2(surf, info, NULL);
 
-    // input size doesn't match the surface size,
-    // request a resize
-    if (info->w != sw || info->h != sh) {
+    // For RGB (32 or 16) we need to align on 8 or 4 pixels, 16 pixels for YUV
+    int align_pixels = (16 / picture->p[0].i_pixel_pitch) - 1;
+    uint32_t aligned_width = (sw + align_pixels) & ~align_pixels;
+
+    if (info->w != aligned_width || info->h != sh) {
+        // input size doesn't match the surface size -> request a resize
         jni_SetAndroidSurfaceSize(sw, sh, sys->i_sar_num, sys->i_sar_den);
         sys->s_unlockAndPost(surf);
         jni_UnlockAndroidSurface();