Update documentation for setSubscriptionOverride

Test: build
Fix: 180496714
Change-Id: Iebfcd0ece1891c1b77d132b92e93d8c1eea3aa6e
Merged-In: Iebfcd0ece1891c1b77d132b92e93d8c1eea3aa6e
diff --git a/core/java/android/net/NetworkPolicyManager.java b/core/java/android/net/NetworkPolicyManager.java
index c1cd09e..12c571f 100644
--- a/core/java/android/net/NetworkPolicyManager.java
+++ b/core/java/android/net/NetworkPolicyManager.java
@@ -479,7 +479,8 @@
      * @param overrideMask the bitmask that specifies which of the overrides is being
      *            set or cleared.
      * @param overrideValue the override values to set or clear.
-     * @param networkTypes the network types this override applies to.
+     * @param networkTypes the network types this override applies to. If no
+     *            network types are specified, override values will be ignored.
      *            {@see TelephonyManager#getAllNetworkTypes()}
      * @param timeoutMillis the timeout after which the requested override will
      *            be automatically cleared, or {@code 0} to leave in the
diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index 06a2648..9d4db17 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -2765,7 +2765,8 @@
      * @param subId the subscriber this override applies to.
      * @param overrideUnmetered set if the billing relationship should be
      *            considered unmetered.
-     * @param networkTypes the network types this override applies to.
+     * @param networkTypes the network types this override applies to. If no
+     *            network types are specified, override values will be ignored.
      *            {@see TelephonyManager#getAllNetworkTypes()}
      * @param timeoutMillis the timeout after which the requested override will
      *            be automatically cleared, or {@code 0} to leave in the
@@ -2829,7 +2830,8 @@
      * @param subId the subscriber this override applies to.
      * @param overrideCongested set if the subscription should be considered
      *            congested.
-     * @param networkTypes the network types this override applies to.
+     * @param networkTypes the network types this override applies to. If no
+     *            network types are specified, override values will be ignored.
      *            {@see TelephonyManager#getAllNetworkTypes()}
      * @param timeoutMillis the timeout after which the requested override will
      *            be automatically cleared, or {@code 0} to leave in the