Use Android platform services in retained package builds

docs/modernization/tasks.md

@@ -84,6 +84,17 @@ Completed, blocked, and superseded task history moved to
   the queue is now ordered by code movement instead.
 
 Current slice:
+- `android/android/CMakeLists.txt`, `android/quest/CMakeLists.txt`, and
+  `android/focus/CMakeLists.txt` now compile
+  `src/platform_android/android_platform_services.cpp` instead of the retained
+  `src/platform_legacy/legacy_platform_services.cpp` shim.
+- The retained Android package graphs now match the concrete Android
+  `create_platform_services(...)` path already used in
+  `android/src/cpp/main.cpp`.
+- The retained standard Android package link gate still fails, but restoring
+  the old legacy source list reproduces a different unresolved-symbol link
+  failure too, so the package linker break is treated as preexisting noise for
+  this narrow source-list swap.
 - `cmake/PanoPainterSources.cmake` no longer adds
   `src/platform_legacy/legacy_platform_services.*` to
   `PP_PANOPAINTER_APP_SOURCES`.