Typo fix - one import per line (#557)

Per Java style guide, each statement should be on its own line.

Mainly just doing this commit to test out my coding setup, though.

Author: asolovay

misc/src/main/java/com/example/snippets/ActivityEmbeddingJavaSnippets.java

@@ -13,7 +13,8 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.OptIn;
-import androidx.annotation.RequiresApi;import androidx.appcompat.app.AppCompatActivity;
+import androidx.annotation.RequiresApi;
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.content.ContextCompat;
 import androidx.startup.Initializer;
 import androidx.window.WindowSdkExtensions;