Do not verify field count in tests used in CTS

Tests in tests/common and tests/cts are run as part of CtsNetTestCases.
Many used assertFieldCountEquals in parceling/unparceling tests to
ensure that unexpected fields were not added, or that they were not
missed when testing parceling/unparceling.

However with many of the classes updatable through module updates, the
field count may change in the future, breaking CTS tests.

Stop checking for the field count, as it would break on module releases,
and its value is lower than the maintenance cost.

Bug: 205901761
Test: atest CtsNetTestCases
Change-Id: I79854741f7e834574d4825bb737ef507785310fe

tests/common/java/android/net/NattKeepalivePacketDataTest.kt

@@ -23,10 +23,9 @@ import android.os.Build
 import androidx.test.filters.SmallTest
 import androidx.test.runner.AndroidJUnit4
 import com.android.testutils.assertEqualBothWays
-import com.android.testutils.assertFieldCountEquals
-import com.android.testutils.assertParcelSane
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.assertParcelingIsLossless
 import com.android.testutils.parcelingRoundTrip
 import java.net.InetAddress
 import org.junit.Assert.assertEquals
@@ -93,7 +92,7 @@ class NattKeepalivePacketDataTest {
 
     @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
     fun testParcel() {
-        assertParcelSane(nattKeepalivePacket(), 0)
+        assertParcelingIsLossless(nattKeepalivePacket())
     }
 
     @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
@@ -103,8 +102,6 @@ class NattKeepalivePacketDataTest {
         assertNotEquals(nattKeepalivePacket(srcAddress = TEST_DST_ADDRV4), nattKeepalivePacket())
         // Test src port only because dst port have to be NATT_PORT
         assertNotEquals(nattKeepalivePacket(srcPort = TEST_PORT2), nattKeepalivePacket())
-        // Make sure the parceling test is updated if fields are added in the base class.
-        assertFieldCountEquals(5, KeepalivePacketData::class.java)
     }
 
     @Test @IgnoreUpTo(Build.VERSION_CODES.Q)