checkstyle: bump to 6.19

Seems like they finally fixed the hanging throws indent issue.

Privileged-Extension/build.gradle

@@ -36,7 +36,7 @@ android {
 }
 
 checkstyle {
-    toolVersion = '6.18'
+    toolVersion = '6.19'
 }
 
 task checkstyle(type: Checkstyle) {

app/build.gradle

@@ -209,7 +209,7 @@ android {
 }
 
 checkstyle {
-    toolVersion = '6.18'
+    toolVersion = '6.19'
 }
 
 task checkstyle(type: Checkstyle) {

app/src/main/java/org/fdroid/fdroid/RepoUpdater.java

@@ -332,7 +332,7 @@ public class RepoUpdater {
      * check that the signing certificate in the jar matches that fingerprint.
      */
     private void verifyAndStoreTOFUCerts(String certFromIndexXml, X509Certificate rawCertFromJar)
-        throws SigningException {
+            throws SigningException {
         if (repo.signingCertificate != null) {
             return; // there is a repo.signingCertificate already, nothing to TOFU
         }

app/src/main/java/org/fdroid/fdroid/data/FDroidProvider.java

@@ -57,7 +57,7 @@ public abstract class FDroidProvider extends ContentProvider {
     @NonNull
     @Override
     public ContentProviderResult[] applyBatch(@NonNull ArrayList<ContentProviderOperation> operations)
-        throws OperationApplicationException {
+            throws OperationApplicationException {
         ContentProviderResult[] result = null;
         isApplyingBatch = true;
         final SQLiteDatabase db = db();
@@ -141,7 +141,7 @@ public abstract class FDroidProvider extends ContentProvider {
     }
 
     protected void validateFields(String[] validFields, ContentValues values)
-        throws IllegalArgumentException {
+            throws IllegalArgumentException {
         for (final String key : getKeySet(values)) {
             boolean isValid = false;
             for (final String validKey : validFields) {