Update call to new signature of wrapBackendTexture

d17f6584df dropped flags and sampleCount,
and GrBackendTextureFlags itself. Drop these here to fix the Android
build.

Change-Id: I44e65b8eba79d8d2a9db9f64b2323f2ba006a8eb
Reviewed-on: https://skia-review.googlesource.com/24866
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

src/gpu/GrAHardwareBufferImageGenerator.cpp

@@ -191,11 +191,8 @@ sk_sp<GrTextureProxy> GrAHardwareBufferImageGenerator::makeProxy(GrContext* cont
         eglDestroyImageKHR(display, image);
         return nullptr;
     }
-    GrBackendTextureFlags flags = kNone_GrBackendTextureFlag;
     sk_sp<GrTexture> tex = context->resourceProvider()->wrapBackendTexture(backendTex,
                                                                        kTopLeft_GrSurfaceOrigin,
-                                                                       flags,
-                                                                       0,
                                                                        kAdopt_GrWrapOwnership);
     if (!tex) {
         glDeleteTextures(1, &texID);