Update createWrappedRenderTargetProxy with BackendRT to work with lazy proxies.

This change also triggered a bunch of side changes thanks to WrappedProxyTest
fixing/improving how we handle wrapped proxies in genernal.

Bug: skia:
Change-Id: I743a458923cff1c2e947627d0e9154a4c808a668
Reviewed-on: https://skia-review.googlesource.com/108102
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrRenderTargetProxy.cpp b/src/gpu/GrRenderTargetProxy.cpp
index 7d872ef..e0dbe8f 100644
--- a/src/gpu/GrRenderTargetProxy.cpp
+++ b/src/gpu/GrRenderTargetProxy.cpp
@@ -39,11 +39,12 @@
                                          LazyInstantiationType lazyType,
                                          const GrSurfaceDesc& desc,
                                          SkBackingFit fit, SkBudgeted budgeted,
-                                         uint32_t flags)
+                                         uint32_t flags,
+                                         GrRenderTargetFlags renderTargetFlags)
         : INHERITED(std::move(callback), lazyType, desc, fit, budgeted, flags)
         , fSampleCnt(desc.fSampleCnt)
         , fNeedsStencil(false)
-        , fRenderTargetFlags(GrRenderTargetFlags::kNone) {
+        , fRenderTargetFlags(renderTargetFlags) {
     SkASSERT(SkToBool(kRenderTarget_GrSurfaceFlag & desc.fFlags));
 }