Add float support to ValueEncoderContext. (#2208)

* Add float support to ValueEncoderContext.

Important for future protobuf support.

* Update api.txt

Author: vkryachko

encoders/firebase-encoders-json/src/main/java/com/google/firebase/encoders/json/JsonValueObjectEncoderContext.java

@@ -171,6 +171,14 @@ public JsonValueObjectEncoderContext add(@Nullable String value) throws IOExcept
     return this;
   }
 
+  @NonNull
+  @Override
+  public JsonValueObjectEncoderContext add(float value) throws IOException {
+    maybeUnNest();
+    jsonWriter.value(value);
+    return this;
+  }
+
   @NonNull
   @Override
   public JsonValueObjectEncoderContext add(double value) throws IOException {

encoders/firebase-encoders/api.txt

@@ -51,6 +51,7 @@ package com.google.firebase.encoders {
 
   public interface ValueEncoderContext {
     method @NonNull public com.google.firebase.encoders.ValueEncoderContext add(@Nullable String);
+    method @NonNull public com.google.firebase.encoders.ValueEncoderContext add(float);
     method @NonNull public com.google.firebase.encoders.ValueEncoderContext add(double);
     method @NonNull public com.google.firebase.encoders.ValueEncoderContext add(int);
     method @NonNull public com.google.firebase.encoders.ValueEncoderContext add(long);

encoders/firebase-encoders/src/main/java/com/google/firebase/encoders/ValueEncoderContext.java

@@ -30,6 +30,10 @@ public interface ValueEncoderContext {
   @NonNull
   ValueEncoderContext add(@Nullable String value) throws IOException;
 
+  /** Adds {@code value} as a primitive encoded value. */
+  @NonNull
+  ValueEncoderContext add(float value) throws IOException;
+
   /** Adds {@code value} as a primitive encoded value. */
   @NonNull
   ValueEncoderContext add(double value) throws IOException;