Specify JDK toolchain directly

Specifying JDK toolchain in the java block lets us avoid specifying
same version again and again for different options while ensuring everything
is on the same version

Ref: https://developer.android.com/build/jdks#toolchain

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/build.gradle.kts

@@ -18,6 +18,12 @@ val gitWorkingBranch = providers.exec {
     commandLine("git", "rev-parse", "--abbrev-ref", "HEAD")
 }.standardOutput.asText.map { it.trim() }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(17)
+    }
+}
+
 android {
     compileSdk = 36
     namespace = "org.schabi.newpipe"
@@ -87,16 +93,9 @@ android {
     compileOptions {
         // Flag to enable support for the new language APIs
         isCoreLibraryDesugaringEnabled = true
-
-        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_17
         encoding = "utf-8"
     }
 
-    kotlinOptions {
-        jvmTarget = "17"
-    }
-
     sourceSets {
         getByName("androidTest") {
             assets.srcDir("$projectDir/schemas")