update Android to use shared mosis-core library

- Remove duplicate sandbox sources from Android (now in core/)
- Update Android CMakeLists to link mosis-core
- Add OpenSSL crypto support for Android
- Update all includes to use core library headers
- Remove duplicate logger from Android (use core logger)
- Add openssl to Android vcpkg dependencies

This removes ~5,500 lines of duplicate code by sharing
the sandbox implementation between desktop and Android.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

core/CMakeLists.txt

@@ -63,6 +63,17 @@ else()
     target_compile_definitions(mosis-core PUBLIC MOSIS_PLATFORM_LINUX)
 endif()
 
+# OpenSSL for crypto on non-Windows platforms
+if(NOT WIN32)
+    find_package(OpenSSL QUIET)
+    if(OpenSSL_FOUND)
+        target_link_libraries(mosis-core PRIVATE OpenSSL::Crypto)
+        target_compile_definitions(mosis-core PRIVATE MOSIS_HAS_OPENSSL)
+    else()
+        message(WARNING "OpenSSL not found - crypto functions will be stubs")
+    endif()
+endif()
+
 # Lua is required - parent project must provide it
 if(TARGET lua_static)
     target_link_libraries(mosis-core PUBLIC lua_static)