feat: add Android task file evidence and finalize plugin design

artemis/graph/graph.py

@@ -1051,6 +1051,11 @@ async def get_graph(ctx: ArtemisContext) -> CompiledStateGraph:
 
     operator_tools = operator_native_tools + operator_specialized_tools
 
+    from artemis.tools.android_files import android_file
+
+    if android_file.is_available(ctx):
+        operator_tools.append(android_file.to_langchain_tool(ctx))
+
     if ctx.execution_setup and ctx.execution_setup.video_recording_tools_enabled:
         operator_tools.append(get_video_analyzer_tool(ctx, role="operator"))