[cmake] Bump minimum version to 3.31 (#4055)

Ubuntu 24.04 can't hurt us anymore.

Some other deps may have their versions raised, but there's not much of
an incentive so we'll keep it as is for now.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4055
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/android/app/build.gradle.kts

@@ -256,7 +256,7 @@ android {
 
     externalNativeBuild {
         cmake {
-            version = "3.22.1"
+            version = "3.31.6"
             path = file("${edenDir}/CMakeLists.txt")
         }
     }