Fix bug where RemoteInputView didn't reopen the IME

Editable TextViews are implicitly selectable. Setting the selectable
property to true however causes a bug where the onTouch logic thinks
the view is not editable and thus doesn't show the IME when clicking
that view.

Change-Id: I9dd6139195bd98b26293e330290650d4e5549a6d
Fixes: 30595718

packages/SystemUI/res/layout/remote_input.xml

@@ -42,7 +42,6 @@
             android:singleLine="true"
             android:ellipsize="start"
             android:inputType="textShortMessage|textAutoCorrect|textCapSentences"
-            android:textIsSelectable="true"
             android:imeOptions="actionNone|flagNoExtractUi" />
 
     <FrameLayout