Remove RenderThread from EglManager

Refactor to make EglManager re-usable.

Test: hwuiunit passes, hwuimacro works

Change-Id: Ie8e9398c703fada1dc5d8baca5f42485eadea202
diff --git a/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp b/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp
index b7aa78b..c3357a2 100644
--- a/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp
+++ b/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp
@@ -166,7 +166,7 @@
 }
 
 DeferredLayerUpdater* SkiaOpenGLPipeline::createTextureLayer() {
-    mEglManager.initialize();
+    mRenderThread.requireGlContext();
     return new DeferredLayerUpdater(mRenderThread.renderState(), createLayer, Layer::Api::OpenGL);
 }
 
@@ -184,6 +184,7 @@
     }
 
     if (surface) {
+        mRenderThread.requireGlContext();
         const bool wideColorGamut = colorMode == ColorMode::WideColorGamut;
         mEglSurface = mEglManager.createSurface(surface, wideColorGamut);
     }
@@ -274,7 +275,7 @@
 
 sk_sp<Bitmap> SkiaOpenGLPipeline::allocateHardwareBitmap(renderthread::RenderThread& renderThread,
                                                          SkBitmap& skBitmap) {
-    renderThread.eglManager().initialize();
+    renderThread.requireGlContext();
 
     sk_sp<GrContext> grContext = sk_ref_sp(renderThread.getGrContext());
     const SkImageInfo& info = skBitmap.info();