Make auto-dark a bit better

Handles transform of basic bitmaps
Tweak to always treat text as foreground

Test: builds, poked around with force_dark
Change-Id: I733d39e05067438335da5a7eac06111f66f1228d
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index d5afb20..26e5cea 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -272,8 +272,12 @@
     mStagingDisplayList = nullptr;
     if (mDisplayList) {
         mDisplayList->syncContents();
+
         if (CC_UNLIKELY(Properties::forceDarkMode)) {
             auto usage = usageHint();
+            if (mDisplayList->hasText()) {
+                usage = UsageHint::Foreground;
+            }
             if (usage == UsageHint::Unknown) {
                 if (mDisplayList->mChildNodes.size() > 1) {
                     usage = UsageHint::Background;