Update Gradle to 8.1 and AGP to v8.0 (#329)

* Update AGP to 8.0.0.

* Set JAVA_HOME to JDK17

* Update lint version.

* Use right JDK for dependency analysis, replace deprecated env var.

* Upgrade to Gradle 8.1.

* Remove `@Supress(DSL_SCOPE_VIOLATION)` as it's no longer needed.

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

app/build.gradle.kts

@@ -21,11 +21,8 @@ import extension.allFeaturesImpl
 import extension.allLibrariesImpl
 import extension.allServicesImpl
 
-// TODO: Remove once https://youtrack.jetbrains.com/issue/KTIJ-19369 is fixed
-@Suppress("DSL_SCOPE_VIOLATION")
 plugins {
     id("io.element.android-compose-application")
-    alias(libs.plugins.stem)
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.anvil)
     alias(libs.plugins.ksp)
@@ -142,7 +139,7 @@ android {
         }
     }
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "17"
     }
 
     // Waiting for https://github.com/google/ksp/issues/37
@@ -153,6 +150,10 @@ android {
             }
         }
     }
+
+    buildFeatures {
+        buildConfig = true
+    }
 }
 
 androidComponents {