fix(deps): update android.gradle.plugin to v8.13.1 (#5260)

* fix(deps): update android.gradle.plugin to v8.13.1

* Remove warning about AGP 8.12.x+

* Fix proguard-related code deprecations, use the new `optimization` API

* Workaround issues related to Android lint not being able to check these complex methods with kotlin contracts

---------

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

app/build.gradle.kts

@@ -129,12 +129,12 @@ android {
             )
             signingConfig = signingConfigs.getByName("debug")
 
-            postprocessing {
-                isRemoveUnusedCode = true
-                isObfuscate = false
-                isOptimizeCode = true
-                isRemoveUnusedResources = true
-                proguardFiles("proguard-rules.pro")
+            optimization {
+                enable = true
+                keepRules {
+                    files.add(File(projectDir, "proguard-rules.pro"))
+                    files.add(getDefaultProguardFile("proguard-android-optimize.txt"))
+                }
             }
         }
 
@@ -152,10 +152,6 @@ android {
             matchingFallbacks += listOf("release")
             signingConfig = signingConfigs.getByName("nightly")
 
-            postprocessing {
-                initWith(release.postprocessing)
-            }
-
             firebaseAppDistribution {
                 artifactType = "APK"
                 // We upload the universal APK to fix this error:
@@ -341,7 +337,7 @@ fun Project.configureLicensesTasks(reportingExtension: ReportingExtension) {
                     it.toString()
                 }
             }
-            val artifactsFile = reportingExtension.file("licensee/android$capitalizedVariantName/artifacts.json")
+            val artifactsFile = reportingExtension.baseDirectory.file("licensee/android$capitalizedVariantName/artifacts.json")
 
             val copyArtifactsTask =
                 project.tasks.register<AssetCopyTask>("copy${capitalizedVariantName}LicenseeReportToAssets") {

app/proguard-rules.pro

@@ -41,8 +41,6 @@
     static int windowAttachCount(android.view.View);
 }
 
--keep class io.element.android.x.di.** { *; }
-
 
 # Keep LogSessionId class and related classes (https://github.com/androidx/media/issues/2535)
 -keep class android.media.metrics.LogSessionId { *; }
@@ -51,3 +49,24 @@
 # Keep Media3 classes that use reflection (https://github.com/androidx/media/issues/2535)
 -keep class androidx.media3.** { *; }
 -dontwarn android.media.metrics.**
+
+# New rules after AGP 8.13.1 upgrade
+-dontwarn androidx.window.extensions.WindowExtensions
+-dontwarn androidx.window.extensions.WindowExtensionsProvider
+-dontwarn androidx.window.extensions.area.ExtensionWindowAreaPresentation
+-dontwarn androidx.window.extensions.layout.DisplayFeature
+-dontwarn androidx.window.extensions.layout.FoldingFeature
+-dontwarn androidx.window.extensions.layout.WindowLayoutComponent
+-dontwarn androidx.window.extensions.layout.WindowLayoutInfo
+-dontwarn androidx.window.sidecar.SidecarDeviceState
+-dontwarn androidx.window.sidecar.SidecarDisplayFeature
+-dontwarn androidx.window.sidecar.SidecarInterface$SidecarCallback
+-dontwarn androidx.window.sidecar.SidecarInterface
+-dontwarn androidx.window.sidecar.SidecarProvider
+-dontwarn androidx.window.sidecar.SidecarWindowLayoutInfo
+
+# Also needed after AGP 8.13.1 upgrade, it seems like proguard is now more aggressive on removing unused code
+-keep class org.matrix.rustcomponents.sdk.** { *;}
+-keep class uniffi.** { *;}
+-keep class io.element.android.x.di.** { *; }
+-keepnames class io.element.android.x.**