Switch from fminf/fmaxf to std::min/max

bug:22208220

Shows considerable improvement in performance, especially in tight
loops.

Change-Id: I4bcf6584a3c145bfc55e73c9c73dcf6199290b3c
diff --git a/libs/hwui/TextureCache.cpp b/libs/hwui/TextureCache.cpp
index 5147e98..fe1b7fd 100644
--- a/libs/hwui/TextureCache.cpp
+++ b/libs/hwui/TextureCache.cpp
@@ -93,7 +93,7 @@
 }
 
 void TextureCache::setFlushRate(float flushRate) {
-    mFlushRate = fmaxf(0.0f, fminf(1.0f, flushRate));
+    mFlushRate = std::max(0.0f, std::min(1.0f, flushRate));
 }
 
 ///////////////////////////////////////////////////////////////////////////////