Bug 5352720: IME_FLAG_NO_EXTRACT_UI is not enforced

CL https://android-git.corp.google.com/g/#/c/136474 refactored
the fullscreen test, but ithe IME_FLAG_NO_EXTRACT_UI test was
lost in the process.

Note that there is still a problem (orthogonal to that change
with key_preview_backing, which appears opaque and black sometimes.

I'll re-open 5315001.

Change-Id: If3a73179d21eaca10bdc948db7bac4b4f7a88d34
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 61b2e93..ff02266 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -991,8 +991,17 @@
 
     @Override
     public boolean onEvaluateFullscreenMode() {
-        return super.onEvaluateFullscreenMode()
-                && mResources.getBoolean(R.bool.config_use_fullscreen_mode);
+        if (!super.onEvaluateFullscreenMode()) return false;
+
+        final EditorInfo ei = getCurrentInputEditorInfo();
+        if (ei != null) {
+            final int imeOptions = ei.imeOptions;
+            if ((imeOptions & EditorInfo.IME_FLAG_NO_EXTRACT_UI) != 0) {
+                return false;
+            }
+        }
+
+        return mResources.getBoolean(R.bool.config_use_fullscreen_mode);
     }
 
     @Override