Update AGP to 8.4.2

OpenKeychain/build.gradle

@@ -108,8 +108,8 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
 
     testOptions.unitTests.all {
@@ -214,14 +214,6 @@ android {
         htmlOutput file('lint-report.html')
     }
 
-    dexOptions {
-        preDexLibraries true
-        // dexInProcess requires much RAM, which is not available on all dev systems
-        dexInProcess false
-        jumboMode true
-        javaMaxHeapSize "2g"
-    }
-
     buildFeatures {
         dataBinding true
     }

OpenKeychain/src/google/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
-        package="org.sufficientlysecure.keychain" >
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="com.android.vending.BILLING" />
 

OpenKeychain/src/main/AndroidManifest.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    package="org.sufficientlysecure.keychain"
     android:installLocation="auto">
 
     <!--