The safest method to get version 1.09 is to purchase the game legally from the Google Play Store to obtain a legitimate APK and OBB base, and then apply the "AML Mod Loader" tools separately, which are freely distributed by the modding community on platforms like LibertyCity or Patreon.
For many years, the classic mobile port of GTA: Vice City (which celebrated its 10th anniversary in 2012) required users to manually sideload an (the application file) and an OBB (the large data file containing maps, audio, and textures). Version 1.09 was one of the most stable iterations of this classic mobile port, offering: gta vice city 109 apk obb link