Update javadocs

Author: daymxn

firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/FirebaseVertexAI.kt

@@ -42,7 +42,7 @@ internal constructor(
   /**
    * Instantiates a new [GenerativeModel] given the provided parameters.
    *
-   * @param modelName The name of the model to use, for example "gemini-1.5-pro".
+   * @param modelName The name of the model to use, for example `"gemini-1.5-pro"`.
    * @param generationConfig The configuration parameters to use for content generation.
    * @param safetySettings The safety bounds the model will abide to during content generation.
    * @param tools A list of [Tool]s the model may use to generate content.

firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/ChatFutures.kt

@@ -21,6 +21,7 @@ import com.google.common.util.concurrent.ListenableFuture
 import com.google.firebase.vertexai.Chat
 import com.google.firebase.vertexai.type.Content
 import com.google.firebase.vertexai.type.GenerateContentResponse
+import com.google.firebase.vertexai.type.InvalidStateException
 import kotlinx.coroutines.reactive.asPublisher
 import org.reactivestreams.Publisher
 

firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/GenerativeModelFutures.kt

@@ -22,6 +22,7 @@ import com.google.firebase.vertexai.GenerativeModel
 import com.google.firebase.vertexai.java.ChatFutures.Companion.from
 import com.google.firebase.vertexai.type.Content
 import com.google.firebase.vertexai.type.CountTokensResponse
+import com.google.firebase.vertexai.type.FirebaseVertexAIException
 import com.google.firebase.vertexai.type.GenerateContentResponse
 import kotlinx.coroutines.reactive.asPublisher
 import org.reactivestreams.Publisher
@@ -65,13 +66,13 @@ public abstract class GenerativeModelFutures internal constructor() {
   public abstract fun countTokens(vararg prompt: Content): ListenableFuture<CountTokensResponse>
 
   /**
-   * Creates a [ChatFuture] instance which internally tracks the ongoing conversation with the
+   * Creates a [ChatFutures] instance which internally tracks the ongoing conversation with the
    * model.
    */
   public abstract fun startChat(): ChatFutures
 
   /**
-   * Creates a [ChatFuture] instance, initialized using the optionally provided [history].
+   * Creates a [ChatFutures] instance, initialized using the optionally provided [history].
    *
    * @param history A list of previous interactions with the model to use as a starting point
    */

firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Content.kt

@@ -24,8 +24,8 @@ import android.graphics.Bitmap
  * `Content` is composed of a one or more heterogeneous parts that can be represent data in
  * different formats, like text or images.
  *
- * @param role The producer of the content. Must be either 'user' or 'model'. By default, it's
- * "user".
+ * @param role The producer of the content. Must be either `"user"` or `"model"`. By default, it's
+ * `"user"`.
  * @param parts An ordered list of [Part] that constitute this content.
  */
 public class Content