Merge "There should be a way to clear additional subtypes."

     * by changing its extra value. The different subtype won't get affected by the stored past

     * status. (You may want to take a look at {@link InputMethodSubtype#hashCode()} to refer

     * to the current implementation.)

     *

     * <p>NOTE: If the same subtype exists in both the manifest XML file and additional subtypes

     * specified by {@code subtypes}, those multiple instances are automatically merged into one

     * instance.</p>

     *

     * <p>CAVEAT: In API Level 23 and prior, the system may do nothing if an empty

     * {@link InputMethodSubtype} is specified in {@code subtypes}, which prevents you from removing

     * the last one entry of additional subtypes. If your IME statically defines one or more

     * subtypes in the manifest XML file, you may be able to work around this limitation by

     * specifying one of those statically defined subtypes in {@code subtypes}.</p>

     *

     * @param imiId Id of InputMethodInfo which additional input method subtypes will be added to.

     * @param subtypes subtypes will be added as additional subtypes of the current input method.

     */

        }

        // By this IPC call, only a process which shares the same uid with the IME can add

        // additional input method subtypes to the IME.

        if (TextUtils.isEmpty(imiId) || subtypes == null || subtypes.length == 0) return;

        if (TextUtils.isEmpty(imiId) || subtypes == null) return;

        synchronized (mMethodMap) {

            final InputMethodInfo imi = mMethodMap.get(imiId);

            if (imi == null) return;