Implement SkSL cache

Implement SkSL cache by reusing code and logic from egl_cache_t.

Test: Improves startup times for gmail by 15ms and 10ms for calc app.
Bug: 66740665
Change-Id: I9ba479c649ba97a2c29a48d40579ba001264c957
diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index c117cb8..574bb02 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -16,6 +16,7 @@
 
 #include "RenderThread.h"
 
+#include "pipeline/skia/ShaderCache.h"
 #include "CanvasContext.h"
 #include "EglManager.h"
 #include "OpenGLReadback.h"
@@ -105,6 +106,7 @@
     mRenderState = new RenderState(*this);
     mVkManager = new VulkanManager(*this);
     mCacheManager = new CacheManager(mDisplayInfo);
+    uirenderer::skiapipeline::ShaderCache::get().initShaderDiskCache();
 }
 
 void RenderThread::dumpGraphicsMemory(int fd) {