checkstyle: bump to 7.0

Remove LITERAL_DO from the config in RightCurly as we want this:

        do {
            foo;
        } while (bar);

Not this:

        do {
            foo;
        }
        while (bar);

This went unnoticed as LITERAL_DO was broken in RightCurly in earlier
Checkstyle versions.

Privileged-Extension/build.gradle

@@ -36,7 +36,7 @@ android {
 }
 
 checkstyle {
-    toolVersion = '6.19'
+    toolVersion = '7.0'
 }
 
 task checkstyle(type: Checkstyle) {

app/build.gradle

@@ -209,7 +209,7 @@ android {
 }
 
 checkstyle {
-    toolVersion = '6.19'
+    toolVersion = '7.0'
 }
 
 task checkstyle(type: Checkstyle) {

config/checkstyle/checkstyle.xml

@@ -96,7 +96,7 @@
         <module name="RightCurly"/>
         <module name="RightCurly">
             <property name="option" value="alone"/>
-            <property name="tokens" value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, LITERAL_DO, STATIC_INIT, INSTANCE_INIT"/>
+            <property name="tokens" value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT, INSTANCE_INIT"/>
         </module>
 
         <module name="EmptyStatement" />