Replace LottieAnimiationView JsonReader API with just InputStream and hide visibility of the Lottie Moshi JSON parsing classes. (#1279)

This PR also hides the visibility of the Lottie Moshi JSON parsing classes.
Fixes #1270
diff --git a/lottie/src/main/java/com/airbnb/lottie/LottieAnimationView.java b/lottie/src/main/java/com/airbnb/lottie/LottieAnimationView.java
index ad70a4b..421abcb 100644
--- a/lottie/src/main/java/com/airbnb/lottie/LottieAnimationView.java
+++ b/lottie/src/main/java/com/airbnb/lottie/LottieAnimationView.java
@@ -32,6 +32,7 @@
 import com.airbnb.lottie.value.SimpleLottieValueCallback;
 
 import java.io.ByteArrayInputStream;
+import java.io.InputStream;
 import java.io.StringReader;
 import java.util.HashSet;
 import java.util.List;
@@ -346,18 +347,18 @@
    * JSONObject never has to be done.
    */
   public void setAnimationFromJson(String jsonString, @Nullable String cacheKey) {
-    setAnimation(JsonReader.of(Okio.buffer(Okio.source(new ByteArrayInputStream(jsonString.getBytes())))), cacheKey);
+    setAnimation(new ByteArrayInputStream(jsonString.getBytes()), cacheKey);
   }
 
   /**
-   * Sets the animation from a JSONReader.
+   * Sets the animation from an arbitrary InputStream.
    * This will load and deserialize the file asynchronously.
    * <p>
    * This is particularly useful for animations loaded from the network. You can fetch the
    * bodymovin json from the network and pass it directly here.
    */
-  public void setAnimation(JsonReader reader, @Nullable String cacheKey) {
-    setCompositionTask(LottieCompositionFactory.fromJsonReader(reader, cacheKey));
+  public void setAnimation(InputStream stream, @Nullable String cacheKey) {
+    setCompositionTask(LottieCompositionFactory.fromJsonInputStream(stream, cacheKey));
   }
 
   /**
diff --git a/lottie/src/main/java/com/airbnb/lottie/parser/moshi/package-info.java b/lottie/src/main/java/com/airbnb/lottie/parser/moshi/package-info.java
new file mode 100644
index 0000000..3c6cd55
--- /dev/null
+++ b/lottie/src/main/java/com/airbnb/lottie/parser/moshi/package-info.java
@@ -0,0 +1,6 @@
+@RestrictTo(LIBRARY)
+package com.airbnb.lottie.parser.moshi;
+
+import androidx.annotation.RestrictTo;
+
+import static androidx.annotation.RestrictTo.Scope.LIBRARY;
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