[SpaccWebView.Android] Make actual Android library, upgrade to SDK 35

SpaccDotWeb.Android/SpaccWebView/build.gradle

@@ -0,0 +1,29 @@
+plugins {
+    id 'com.android.library'
+}
+
+android {
+    namespace 'org.eu.spacc.spaccwebview.android'
+
+    defaultConfig {
+        minSdk 1
+        compileSdk 35
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+}
+
+dependencies {
+//    testImplementation 'junit:junit:4.13.2'
+//    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+//    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
+}