Fix bug 5341804 - Unable to type into the find on page CAB

Standalone action mode windows should be focusable.

Change-Id: I7ce23f1028eb0d0d36bdb287589a6018dc178580

policy/src/com/android/internal/policy/impl/PhoneWindow.java

@@ -2135,6 +2135,7 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
                                 com.android.internal.R.attr.actionModePopupWindowStyle);
                         mActionModePopup.setLayoutInScreenEnabled(true);
                         mActionModePopup.setLayoutInsetDecor(true);
+                        mActionModePopup.setFocusable(true);
                         mActionModePopup.setWindowLayoutType(
                                 WindowManager.LayoutParams.TYPE_APPLICATION);
                         mActionModePopup.setContentView(mActionModeView);