Update to kotlin 1.7.10, remove test dependancy from common source set, cleanup some old comments

sample/build.gradle.kts

@@ -352,8 +352,8 @@ kotlin {
 
         all {
             languageSettings.enableLanguageFeature("InlineClasses")
-            languageSettings.useExperimentalAnnotation("kotlin.ExperimentalUnsignedTypes")
-            languageSettings.useExperimentalAnnotation("kotlin.ExperimentalStdlibApi")
+            languageSettings.optIn("kotlin.ExperimentalUnsignedTypes")
+            languageSettings.optIn("kotlin.ExperimentalStdlibApi")
         }
     }
 
@@ -390,10 +390,6 @@ android {
         exclude("META-INF/ktor-io.kotlin_module")
         exclude("META-INF/ktor-*")
     }
-    compileOptions {
-        setSourceCompatibility(JavaVersion.VERSION_1_8)
-        setTargetCompatibility(JavaVersion.VERSION_1_8)
-    }
     tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
         kotlinOptions {
             jvmTarget = "1.8"

sample/src/androidMain/AndroidManifest.xml

@@ -3,8 +3,8 @@
   -->
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-        package="com.ionspin.kotlin.crypto.sample">
-    <uses-permission android:name="android.permission.INTERNET" />
+          package="com.ionspin.kotlin.crypto.sample">
+    <uses-permission android:name="android.permission.INTERNET"/>
 
     <application
             android:name=".LibsodiumBindingsSampleApp"
@@ -16,12 +16,13 @@
             android:theme="@style/AppTheme"
             android:usesCleartextTraffic="true"> <!-- Just for development -->
         <activity android:name=".MainActivity"
-            android:windowSoftInputMode="adjustPan|adjustResize"
-            >
+                  android:exported="true"
+                  android:windowSoftInputMode="adjustPan|adjustResize"
+        >
             <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
+                <action android:name="android.intent.action.MAIN"/>
 
-                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
     </application>