Fix RenderThread setForLooper

RenderThread doesn't use ThreadBase::threadLoop
so it also needs to explicitly Looper::setForLooper

Fixes: 124467483
Test: hwuiunit
Change-Id: I3703b5d3dbbbaa68e88fc23756dfccacfce863cb
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index 0335a7c..793dd8d 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -318,6 +318,7 @@
         "tests/unit/RenderNodeDrawableTests.cpp",
         "tests/unit/RenderNodeTests.cpp",
         "tests/unit/RenderPropertiesTests.cpp",
+        "tests/unit/RenderThreadTests.cpp",
         "tests/unit/ShaderCacheTests.cpp",
         "tests/unit/SkiaBehaviorTests.cpp",
         "tests/unit/SkiaDisplayListTests.cpp",