Merge "Update Javadoc for `TelecomManager.endCall()`." into main

    /**

     * Ends the foreground call on the device.

     * <p>

     * If there is a ringing call, calling this method rejects the ringing call. Otherwise, the

     * foreground call is ended.

     * If there is a single call and it is ringing, calling this method rejects the ringing call.

     * Otherwise, the foreground (active) call is ended preferentially.

     * <p>

     * Note: this method CANNOT be used to end ongoing emergency calls and will return {@code false}

     * if an attempt is made to end an emergency call.

     * <p>

     * Note: If the foreground call on this device is self-managed, this method will only end

     * the call if the caller of this method is privileged (i.e. system, shell, or root) or system

     * UI.

     * Note: If the foreground call on this device is self-managed or transactional, this method

     * will only end the call if the caller of this method is privileged (i.e. system, shell, or

     * root) or system UI.

     *

     * @return {@code true} if there is a call which will be rejected or terminated, {@code false}

     * otherwise.