CDD: Handheld recommedations for long press of KEYCODE_MEDIA_PLAY_PAUSE/
KEYCODE_HEADSETHOOK.

This enables a way to launch voice search with wired/BT headsets
across different devices.


BUG: 69103849
TEST: manual -
Change-Id: I9e74bc8d8c09681338b5e7ec23565cb126258ec1
diff --git a/2_device-types/2_2_handheld-reqs.md b/2_device-types/2_2_handheld-reqs.md
index fcf4446..f2a68b5 100644
--- a/2_device-types/2_2_handheld-reqs.md
+++ b/2_device-types/2_2_handheld-reqs.md
@@ -53,6 +53,12 @@
 http://developer.android.com/reference/android/view/KeyEvent.html#KEYCODE_BACK))
 to the foreground application.
 *   [[7.2](#7_2_input-devices).4/H-0-1] MUST support touchscreen input.
+*   [[7.2](#7_2_input-devices).4/H-SR] Are STRONGLY RECOMMENDED to launch the
+user-selected assist app, in other words the app that implements
+VoiceInteractionService, or an activity handling the [`ACTION_ASSIST`](https://developer.android.com/reference/android/content/Intent#ACTION_ASSIST)
+on long-press of [`KEYCODE_MEDIA_PLAY_PAUSE`](https://developer.android.com/reference/android/view/KeyEvent#KEYCODE_MEDIA_PLAY_PAUSE)
+or [`KEYCODE_HEADSETHOOK`](https://developer.android.com/reference/android/view/KeyEvent#KEYCODE_HEADSETHOOK)
+if the foreground activity does not handle those long-press events.
 *  [[7.3](#7_3_sensors).1/H-SR] Are STRONGLY RECOMMENDED to include a 3-axis
 accelerometer.