Refactoring the GPU acceleration implementation

Dockerfile

@@ -38,6 +38,7 @@ ARG IMG_TYPE=google_apis
 ARG ARCHITECTURE=x86_64
 ARG CMD_LINE_VERSION=9477386_latest
 ARG DEVICE_ID=pixel
+ARG GPU_ACCELERATED=false
 
 # Environment variables.
 ENV ANDROID_SDK_ROOT=/opt/android \
@@ -47,8 +48,8 @@ ENV ANDROID_SDK_ROOT=/opt/android \
 		DEVICE_ID=$DEVICE_ID \
     ARCHITECTURE=$ARCHITECTURE \
     ABI=${IMG_TYPE}/${ARCHITECTURE} \
+    GPU_ACCELERATED=$GPU_ACCELERATED \
     QTWEBENGINE_DISABLE_SANDBOX=1 \
-    DISPLAY=:99 \
     ANDROID_EMULATOR_WAIT_TIME_BEFORE_KILL=10
 
 # Exporting environment variables for keeping in the path