Reduce some test paths

The emulator tests are a bit slow and fails with so many cases.
Reduce the number of scaling tests and run them only when config
is ARGB_8888.

android_jni/avifandroidjni/src/androidTest/java/org/aomedia/avif/android/AvifDecoderTest.java

@@ -95,7 +95,7 @@ public ByteBuffer getBuffer() throws IOException {
 
   private static final int AVIF_RESULT_OK = 0;
 
-  private static final float[] SCALE_FACTORS = {0.5f, 1.3f, 2.0f};
+  private static final float[] SCALE_FACTORS = {0.5f, 1.3f};
 
   private static final Image[] IMAGES = {
     // Parameter ordering for still images: directory, filename, width, height, depth, alphaPresent,
@@ -160,24 +160,27 @@ public void testDecodeUtilityClass() throws IOException {
     assertThat(bitmap).isNotNull();
     assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
 
-    // Test scaling.
-    for (float scale_factor : SCALE_FACTORS) {
-      // Scale both width and height.
-      bitmap =
-          Bitmap.createBitmap(
-              (int) (info.width * scale_factor), (int) (info.height * scale_factor), config);
-      assertThat(bitmap).isNotNull();
-      assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
+    // Test scaling. These tests can be a bit slow on emulators, so only run them when config is
+    // ARGB_8888.
+    if (config == Config.ARGB_8888) {
+      for (float scale_factor : SCALE_FACTORS) {
+        // Scale both width and height.
+        bitmap =
+            Bitmap.createBitmap(
+                (int) (info.width * scale_factor), (int) (info.height * scale_factor), config);
+        assertThat(bitmap).isNotNull();
+        assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
 
-      // Scale width only.
-      bitmap = Bitmap.createBitmap((int) (info.width * scale_factor), info.height, config);
-      assertThat(bitmap).isNotNull();
-      assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
+        // Scale width only.
+        bitmap = Bitmap.createBitmap((int) (info.width * scale_factor), info.height, config);
+        assertThat(bitmap).isNotNull();
+        assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
 
-      // Scale height only.
-      bitmap = Bitmap.createBitmap(info.width, (int) (info.height * scale_factor), config);
-      assertThat(bitmap).isNotNull();
-      assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
+        // Scale height only.
+        bitmap = Bitmap.createBitmap(info.width, (int) (info.height * scale_factor), config);
+        assertThat(bitmap).isNotNull();
+        assertThat(AvifDecoder.decode(buffer, buffer.remaining(), bitmap)).isTrue();
+      }
     }
   }
 
@@ -225,8 +228,9 @@ public void testDecodeRegularClass() throws IOException {
       assertThat(decoder.nthFrame(image.frameCount, bitmap)).isNotEqualTo(AVIF_RESULT_OK);
 
       // The following block of code that tests scaling assumes that the animated image under test
-      // has at least 10 frames.
-      if (image.frameCount >= 10) {
+      // has at least 7 frames. These tests can be a bit slow on emulators, so only run them when
+      // config is ARGB_8888.
+      if (image.frameCount >= 7 && config == Config.ARGB_8888) {
         // Reset the decoder to the first frame.
         assertThat(decoder.nthFrame(0, bitmap)).isEqualTo(AVIF_RESULT_OK);
         for (float scale_factor : SCALE_FACTORS) {