Merge "Documentation warning against short-lived Contexts" into nyc-mr1-dev

import android.annotation.WorkerThread;

import android.app.Activity;

import android.app.PendingIntent;

import android.app.Service;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

     *

     * <p> This method may block while waiting for a connection to another process, and must never

     * be called from the main thread.

     * <p> As {@link Activity} and {@link Service} contexts are short-lived and can be destroyed

     * at any time from the main thread, it is safer to rely on a long-lived context such as one

     * returned from {@link Context#getApplicationContext()}.

     *

     * @param alias The alias of the desired private key, typically returned via

     *              {@link KeyChainAliasCallback#alias}.

     *

     * <p> This method may block while waiting for a connection to another process, and must never

     * be called from the main thread.

     * <p> As {@link Activity} and {@link Service} contexts are short-lived and can be destroyed

     * at any time from the main thread, it is safer to rely on a long-lived context such as one

     * returned from {@link Context#getApplicationContext()}.

     *

     * @param alias The alias of the desired certificate chain, typically

     * returned via {@link KeyChainAliasCallback#alias}.