ProjectConfig: Use conditional-and (&&) instead of bitwise-and (&)

Change-Id: I8c8bf7aa9bee45b559c585fcc63c2f265037bbe8
Signed-off-by: Edwin Kempin <ekempin@google.com>
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/git/ProjectConfig.java b/gerrit-server/src/main/java/com/google/gerrit/server/git/ProjectConfig.java
index 219bc78..f8ee4a7 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/git/ProjectConfig.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/git/ProjectConfig.java
@@ -543,7 +543,7 @@
       Config rc, Map<String, GroupReference> groupsByName) {
     accessSections = new HashMap<>();
     for (String refName : rc.getSubsections(ACCESS)) {
-      if (RefConfigSection.isValid(refName) & isValidRegex(refName)) {
+      if (RefConfigSection.isValid(refName) && isValidRegex(refName)) {
         AccessSection as = getAccessSection(refName, true);
 
         for (String varName : rc.getStringList(ACCESS, refName, KEY_GROUP_PERMISSIONS)) {