Move connectivity events to frameworks/base.

Fixes a crash in bluetooth' DhcpClient due to Class(not)Loader.

Change-Id: I318c033aa8782c27a243104f85950adbf07d03a6
BUG: 27885860
BUG: 25691077

core/java/android/net/metrics/CaptivePortalCheckResultEvent.java

@@ -19,6 +19,9 @@ package android.net.metrics;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class CaptivePortalCheckResultEvent extends IpConnectivityEvent implements Parcelable {
     public static final String TAG = "CaptivePortalCheckResultEvent";
 

core/java/android/net/metrics/CaptivePortalStateChangeEvent.java

@@ -19,6 +19,9 @@ package android.net.metrics;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class CaptivePortalStateChangeEvent extends IpConnectivityEvent implements Parcelable {
     public static final String TAG = "CaptivePortalStateChangeEvent";
 

core/java/android/net/metrics/ConnectivityServiceChangeEvent.java

@@ -19,6 +19,9 @@ package android.net.metrics;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class ConnectivityServiceChangeEvent extends IpConnectivityEvent implements Parcelable {
     public static final String TAG = "ConnectivityServiceChangeEvent";
 

core/java/android/net/metrics/DhcpClientEvent.java

@@ -19,6 +19,9 @@ package android.net.metrics;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class DhcpClientEvent extends IpConnectivityEvent implements Parcelable {
     public static final String TAG = "DhcpClientEvent";
 

core/java/android/net/metrics/IpConnectivityEvent.java

@@ -20,6 +20,9 @@ import android.net.ConnectivityMetricsLogger;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class IpConnectivityEvent implements Parcelable {
     // IPRM = IpReachabilityMonitor
     // DHCP = DhcpClient

core/java/android/net/metrics/IpReachabilityMonitorMessageEvent.java

@@ -19,6 +19,9 @@ package android.net.metrics;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class IpReachabilityMonitorMessageEvent extends IpConnectivityEvent
     implements Parcelable {
     public static final String TAG = "IpReachabilityMonitorMessageEvent";

core/java/android/net/metrics/IpReachabilityMonitorProbeEvent.java

@@ -19,6 +19,9 @@ package android.net.metrics;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+/**
+ * {@hide}
+ */
 public class IpReachabilityMonitorProbeEvent extends IpConnectivityEvent
     implements Parcelable {
     public static final String TAG = "IpReachabilityMonitorProbeEvent";