Update android.gradle.plugin to v8.5.2 (#3004)

* Update android.gradle.plugin

* Fix release builds with AGP 8.5 by removing the minification config in each library module. I believe this is now centralised.

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Jorge Martín <jorgem@element.io>

app/proguard-rules.pro

@@ -40,3 +40,5 @@
 -keepclassmembers class android.view.JavaViewSpy {
     static int windowAttachCount(android.view.View);
 }
+
+-keep class io.element.android.x.di.** { *; }