Playground: wire TextEncoder polyfill from JsRuntimeHost

JsRuntimeHost #171 added a TextEncoder polyfill alongside the
existing TextDecoder one (per @bghgary's review feedback on this
PR, where the polyfill originally lived in BN itself). Bump the
JsRuntimeHost pin and link / initialize TextEncoder the same way
TextDecoder is linked / initialized.

Pin bump:
  1e9b17e4 (Bump UrlLib pin) -> 81b01d2e (Add TextEncoder polyfill)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bkaradzic-microsoft

Apps/Playground/Android/BabylonNative/CMakeLists.txt

@@ -46,5 +46,6 @@ target_link_libraries(BabylonNativeJNI
     PRIVATE ShaderCache
     PRIVATE TestUtils
     PRIVATE TextDecoder
+    PRIVATE TextEncoder
     PRIVATE Window
     PRIVATE XMLHttpRequest)

Apps/Playground/CMakeLists.txt

@@ -155,6 +155,7 @@ target_link_libraries(Playground
     PRIVATE ShaderCache
     PRIVATE TestUtils
     PRIVATE TextDecoder
+    PRIVATE TextEncoder
     PRIVATE Window
     PRIVATE XMLHttpRequest
     ${ADDITIONAL_LIBRARIES}

Apps/Playground/Shared/AppContext.cpp

@@ -24,6 +24,7 @@
 #include <Babylon/Polyfills/File.h>
 #include <Babylon/Polyfills/Performance.h>
 #include <Babylon/Polyfills/TextDecoder.h>
+#include <Babylon/Polyfills/TextEncoder.h>
 #include <Babylon/Polyfills/Window.h>
 #include <Babylon/Polyfills/XMLHttpRequest.h>
 
@@ -190,6 +191,8 @@ AppContext::AppContext(
 
         Babylon::Polyfills::TextDecoder::Initialize(env);
 
+        Babylon::Polyfills::TextEncoder::Initialize(env);
+
         Babylon::Polyfills::XMLHttpRequest::Initialize(env);
         m_canvas.emplace(Babylon::Polyfills::Canvas::Initialize(env));