Disable flaky ModelDownloader integration tests.

Bug: 284901878
Change-Id: I854ba66b4f1cf524ac7e9519b6105b4ceffe8179

java/tests/instrumentation/src/com/android/textclassifier/downloader/ModelDownloaderIntegrationTest.java

diff --git a/java/tests/instrumentation/src/com/android/textclassifier/downloader/ModelDownloaderIntegrationTest.java b/java/tests/instrumentation/src/com/android/textclassifier/downloader/ModelDownloaderIntegrationTest.java
index bbc2303..2d06afd 100644
--- a/java/tests/instrumentation/src/com/android/textclassifier/downloader/ModelDownloaderIntegrationTest.java
+++ b/java/tests/instrumentation/src/com/android/textclassifier/downloader/ModelDownloaderIntegrationTest.java
@@ -70,6 +70,7 @@
   }
 
   @Test
+  @FlakyTest(bugId = 284901878)
   public void smokeTest() throws Exception {
     extServicesTextClassifierRule.addDeviceConfigOverride(
         "manifest_url_annotator_en", V804_EN_ANNOTATOR_MANIFEST_URL);
@@ -78,6 +79,7 @@
   }
 
   @Test
+  @FlakyTest(bugId = 284901878)
   public void downgradeModel() throws Exception {
     // Download an experimental model.
     extServicesTextClassifierRule.addDeviceConfigOverride(
@@ -93,6 +95,7 @@
   }
 
   @Test
+  @FlakyTest(bugId = 284901878)
   public void upgradeModel() throws Exception {
     // Download a model.
     extServicesTextClassifierRule.addDeviceConfigOverride(
@@ -108,6 +111,7 @@
   }
 
   @Test
+  @FlakyTest(bugId = 284901878)
   public void clearFlag() throws Exception {
     // Download a new model.
     extServicesTextClassifierRule.addDeviceConfigOverride(