Address comments on NetworkStack AIDL v6

Address issues found during AIDL review:
 - Rename clientAddr to singleClientAddr
 - Do not use a ParcelableBundle for notifyNetworkTested or
   notifyDataStallSuspected; instead use AIDL parcelables for stronger
   backwards compatibility guarantees.

Test: atest NetworkMonitorTest ConnectivityServiceTest
      ConnectivityServiceIntegrationTest, manual
Bug: 153500847
Change-Id: Id9b71784e5f6294d203230e57737979e063ff0f8

Tethering/src/android/net/dhcp/DhcpServingParamsParcelExt.java

@@ -169,7 +169,7 @@ public class DhcpServingParamsParcelExt extends DhcpServingParamsParcel {
      * <p>If not set, the default value is null.
      */
     public DhcpServingParamsParcelExt setSingleClientAddr(@Nullable Inet4Address clientAddr) {
-        this.clientAddr = clientAddr == null ? 0 : inet4AddressToIntHTH(clientAddr);
+        this.singleClientAddr = clientAddr == null ? 0 : inet4AddressToIntHTH(clientAddr);
         return this;
     }
 

Tethering/tests/unit/src/android/net/dhcp/DhcpServingParamsParcelExtTest.java

@@ -110,7 +110,7 @@ public class DhcpServingParamsParcelExtTest {
     @Test
     public void testSetClientAddr() {
         mParcel.setSingleClientAddr(TEST_CLIENT_ADDRESS);
-        assertEquals(TEST_CLIENT_ADDRESS_PARCELED, mParcel.clientAddr);
+        assertEquals(TEST_CLIENT_ADDRESS_PARCELED, mParcel.singleClientAddr);
     }
 
     private static Inet4Address inet4Addr(String addr) {

Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java

@@ -1689,7 +1689,7 @@ public class TetheringTest {
         final DhcpServingParamsParcel params = dhcpParamsCaptor.getValue();
         assertEquals(serverAddr, intToInet4AddressHTH(params.serverAddr).getHostAddress());
         assertEquals(24, params.serverAddrPrefixLength);
-        assertEquals(clientAddrParceled, params.clientAddr);
+        assertEquals(clientAddrParceled, params.singleClientAddr);
     }
 
     @Test