Only check password length for relevant qualities.

The minimum password length is only required for certain password
qualities so only check the minimum length in those cases.

Bug: 30109030
Change-Id: I330c88fc0b22179e126fc1241a9c58d5e0d73e8e
diff --git a/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java b/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java
index feeed8b..d0aeb92 100644
--- a/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java
+++ b/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java
@@ -3672,12 +3672,16 @@
 
     private boolean isActivePasswordSufficientForUserLocked(
             DevicePolicyData policy, int userHandle, boolean parent) {
-        if (policy.mActivePasswordQuality < getPasswordQuality(null, userHandle, parent)
-                || policy.mActivePasswordLength < getPasswordMinimumLength(
+        final int requiredPasswordQuality = getPasswordQuality(null, userHandle, parent);
+        if (policy.mActivePasswordQuality < requiredPasswordQuality) {
+            return false;
+        }
+        if (requiredPasswordQuality >= DevicePolicyManager.PASSWORD_QUALITY_NUMERIC
+                && policy.mActivePasswordLength < getPasswordMinimumLength(
                         null, userHandle, parent)) {
             return false;
         }
-        if (policy.mActivePasswordQuality != DevicePolicyManager.PASSWORD_QUALITY_COMPLEX) {
+        if (requiredPasswordQuality != DevicePolicyManager.PASSWORD_QUALITY_COMPLEX) {
             return true;
         }
         return policy.mActivePasswordUpperCase >= getPasswordMinimumUpperCase(