Increase the persistent storage size for SkSL Shaders

Fixes: 190348616
Test: builds

We're now using more complex shaders in more places. This allows us to
store more of them.

Change-Id: I1be3da0458c4b64f7082a2e1bc0d08b0824bbeba

libs/hwui/pipeline/skia/ShaderCache.cpp

@@ -31,7 +31,7 @@ namespace skiapipeline {
 
 // Cache size limits.
 static const size_t maxKeySize = 1024;
-static const size_t maxValueSize = 512 * 1024;
+static const size_t maxValueSize = 2 * 1024 * 1024;
 static const size_t maxTotalSize = 1024 * 1024;
 
 ShaderCache::ShaderCache() {