android_jni: Do not test F16 for animations

x86 emulators are flaky and show random crashes/OOM errors when
decoding animations to F16.

GOOGLE_INTERNAL_CL: 525516931
diff --git a/android_jni/avifandroidjni/src/androidTest/java/org/aomedia/avif/android/AnimatedImageTest.java b/android_jni/avifandroidjni/src/androidTest/java/org/aomedia/avif/android/AnimatedImageTest.java
index 4ab23c3..5851452 100644
--- a/android_jni/avifandroidjni/src/androidTest/java/org/aomedia/avif/android/AnimatedImageTest.java
+++ b/android_jni/avifandroidjni/src/androidTest/java/org/aomedia/avif/android/AnimatedImageTest.java
@@ -63,7 +63,8 @@
   private static final String ASSET_DIRECTORY = "animated_avif";
 
   private static final Bitmap.Config[] BITMAP_CONFIGS = {
-    Config.ARGB_8888, Config.RGBA_F16, Config.RGB_565,
+    // RGBA_F16 is not tested because x86 emulators are flaky with that.
+    Config.ARGB_8888, Config.RGB_565,
   };
 
   @Parameters