Add new ASSIST key and map it to the global assist intent.

Moved some duplicate code from SearchPanelView and LockScreen
over to SearchManager to avoid creating yet another copy of it
in PhoneWindowManager.

Bug: 6594275
Change-Id: Ib4ebcd6817639d17548952ab2ce7cb876c05777c
diff --git a/include/androidfw/KeycodeLabels.h b/include/androidfw/KeycodeLabels.h
index 1828062..538949d 100755
--- a/include/androidfw/KeycodeLabels.h
+++ b/include/androidfw/KeycodeLabels.h
@@ -243,6 +243,7 @@
     { "YEN", 216 },
     { "RO", 217 },
     { "KANA", 218 },
+    { "ASSIST", 219 },
 
     // NOTE: If you add a new keycode here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.