Resolve all AGP 8 warnings/problems

Author: complexspaces

android/rustls-platform-verifier/build.gradle

@@ -31,6 +31,8 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    namespace "org.rustls.platformverifier"
+
     buildTypes {
         release {
             minifyEnabled false
@@ -67,6 +69,9 @@ android {
             }
         }
     }
+    buildFeatures {
+        buildConfig true
+    }
 }
 
 configurations {
@@ -75,7 +80,7 @@ configurations {
 
 task ktlint(type: JavaExec, group: "verification") {
     description = "Check Kotlin code style."
-    main = "com.pinterest.ktlint.Main"
+    mainClass = "com.pinterest.ktlint.Main"
     classpath = configurations.ktlint
     args "src/**/*.kt"
 }
@@ -84,7 +89,7 @@ check.dependsOn ktlint
 
 task ktlintFormat(type: JavaExec, group: "formatting") {
     description = "Fix Kotlin code style deviations."
-    main = "com.pinterest.ktlint.Main"
+    mainClass = "com.pinterest.ktlint.Main"
     classpath = configurations.ktlint
     args "-F", "src/**/*.kt"
 }

android/rustls-platform-verifier/src/main/AndroidManifest.xml

@@ -1,3 +1,2 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="org.rustls.platformverifier"/>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"/>