docs: Added note in getCacheDir() that developers can use directory obtained from getExternalCacheDir() to store app caches larger than 1 MB.

am: e9681e192a

Change-Id: Ide8f3c2dd5414737c798c20c1fe9f11dcd9640ce

core/java/android/content/Context.java

@@ -1130,7 +1130,9 @@ public abstract class Context {
      * <strong>Note: you should not <em>rely</em> on the system deleting these
      * files for you; you should always have a reasonable maximum, such as 1 MB,
      * for the amount of space you consume with cache files, and prune those
-     * files when exceeding that space.</strong>
+     * files when exceeding that space.</strong> If your app requires a larger
+     * cache (larger than 1 MB), you should use {@link #getExternalCacheDir()}
+     * instead.
      * <p>
      * The returned path may change over time if the calling app is moved to an
      * adopted storage device, so only relative paths should be persisted.
@@ -1142,6 +1144,7 @@ public abstract class Context {
      * @see #openFileOutput
      * @see #getFileStreamPath
      * @see #getDir
+     * @see #getExternalCacheDir
      */
     public abstract File getCacheDir();
 
@@ -1190,7 +1193,7 @@ public abstract class Context {
      * </ul>
      * <p>
      * If a shared storage device is emulated (as determined by
-     * {@link Environment#isExternalStorageEmulated(File)}), it's contents are
+     * {@link Environment#isExternalStorageEmulated(File)}), its contents are
      * backed by a private user data partition, which means there is little
      * benefit to storing data here instead of the private directory returned by
      * {@link #getCacheDir()}.