Remove toString test.

This is not a stable format.

Bug: 285376559
Bug: 265470635
Test: N/A
Change-Id: I15b58ff7a50f9f1acc3d5e8f86f9272855183870

tests/unit/java/android/net/KeepalivePacketDataUtilTest.java

@@ -168,12 +168,6 @@ public final class KeepalivePacketDataUtilTest {
         assertEquals(resultData.rcvWndScale, wndScale);
         assertEquals(resultData.tos, tos);
         assertEquals(resultData.ttl, ttl);
-
-        final String expected = TcpKeepalivePacketDataParcelable.class.getName()
-                + "{srcAddress: [10, 0, 0, 1],"
-                + " srcPort: 1234, dstAddress: [10, 0, 0, 5], dstPort: 4321, seq: 286331153,"
-                + " ack: 572662306, rcvWnd: 48000, rcvWndScale: 2, tos: 4, ttl: 64}";
-        assertEquals(expected, resultData.toString());
     }
 
     @Test