java: Stop using dev.rikka.hidden.stub

- We dont need the whole dev.rikka.hidden.stub library so just remove it and simplify dependencies.
- We already have our own stub package so we can just include the missing stubs that we want directly in it.

Signed-off-by: Dakkshesh <beakthoven@gmail.com>

gradle/libs.versions.toml

@@ -1,14 +1,12 @@
 [versions]
 agp = "8.12.0"
 annotation = "1.9.1"
-hidden-api = "4.4.0"
 jdk18on = "1.81"
 kotlin = "2.2.10"
 libcxx = "28.1.13356709"
 
 [libraries]
 annotation = { module = "androidx.annotation:annotation", version.ref = "annotation" }
-dev-rikka-hidden-stub = { module = "dev.rikka.hidden:stub", version.ref = "hidden-api" }
 org-bouncycastle-bcpkix-jdk18on = { module = "org.bouncycastle:bcpkix-jdk18on", version.ref = "jdk18on" }
 org-lsposed-libcxx-libcxx = { module = "org.lsposed.libcxx:libcxx", version.ref = "libcxx" }