api: replace WindowId From/Into u64 with WindowId::{from,into}_raw()

Co-authored-by: Mads Marquart <mads@marquart.dk>
Co-authored-by: Kirill Chibisov <contact@kchibisov.com>

src/platform_impl/android/mod.rs

@@ -671,16 +671,12 @@ impl WindowId {
     pub const fn dummy() -> Self {
         WindowId
     }
-}
 
-impl From<WindowId> for u64 {
-    fn from(_: WindowId) -> Self {
+    pub const fn into_raw(self) -> u64 {
         0
     }
-}
 
-impl From<u64> for WindowId {
-    fn from(_: u64) -> Self {
+    pub const fn from_raw(_id: u64) -> Self {
         Self
     }
 }