Refactor AppSearch to split into AppSearchDocument and AppSearchEmail.

import android.annotation.CallbackExecutor;

import android.annotation.NonNull;

import android.annotation.SystemService;

import android.app.appsearch.AppSearch.Document;

import android.content.Context;

import android.os.RemoteException;

    }

    /**

     * Index {@link android.app.appsearch.AppSearch.Document Documents} into AppSearch.

     * Index {@link AppSearchDocument Documents} into AppSearch.

     *

     * <p>You should not call this method directly; instead, use the

     * {@code AppSearch#putDocuments()} API provided by JetPack.

     *

     * <p>Each {@link AppSearch.Document Document's} {@code schemaType} field must be set to the

     * <p>Each {@link AppSearchDocument Document's} {@code schemaType} field must be set to the

     * name of a schema type previously registered via the {@link #setSchema} method.

     *

     * @param documents {@link Document Documents} that need to be indexed.

     * @param documents {@link AppSearchDocument Documents} that need to be indexed.

     * @return An {@link AppSearchBatchResult} mapping the document URIs to {@link Void} if they

     *     were successfully indexed, or a {@link Throwable} describing the failure if they could

     *     not be indexed.

     * @hide

     */

    public AppSearchBatchResult<String, Void> putDocuments(@NonNull List<Document> documents) {

    public AppSearchBatchResult<String, Void> putDocuments(

            @NonNull List<AppSearchDocument> documents) {

        // TODO(b/146386470): Transmit these documents as a RemoteStream instead of sending them in

        // one big list.

        List<byte[]> documentsBytes = new ArrayList<>(documents.size());

        for (Document document : documents) {

        for (AppSearchDocument document : documents) {

            documentsBytes.add(document.getProto().toByteArray());

        }

        AndroidFuture<AppSearchBatchResult> future = new AndroidFuture<>();

    private final String mPropertyPath;

    private final SnippetMatchProto mSnippetMatch;

    private final AppSearch.Document mDocument;

    private final AppSearchDocument mDocument;

    /**

     * List of content with same property path in a document when there are multiple matches in

     * repeated sections.

    /** @hide */

    public MatchInfo(@NonNull String propertyPath, @NonNull SnippetMatchProto snippetMatch,

            @NonNull AppSearch.Document document) {

            @NonNull AppSearchDocument document) {

        mPropertyPath = propertyPath;

        mSnippetMatch = snippetMatch;

        mDocument = document;