Revert "[TTS] Reenable CSMTest suite with longer timeout."

This reverts commit a5ef8671.

Reason for revert: Still flaking a lot.

Original change's description:
> [TTS] Reenable CSMTest suite with longer timeout.
> 
> Speculatively re-enables the ContextualSearchManagerTest suite with
> the hope that the mysterious underlying flakiness issue has gone
> away, or that the longer timeout in this version of the code will
> help.
> 
> Original disabling CL: https://crrev.com/c/2088007
> 
> TBR=twellington@chromium.org
> 
> BUG=1058362
> 
> Change-Id: I02ea4f209b86b730cc6f40622839ffb12f3753c7
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094245
> Commit-Queue: Donn Denman <donnd@chromium.org>
> Reviewed-by: Donn Denman <donnd@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#748287}

TBR=donnd@chromium.org,twellington@chromium.org

Change-Id: Ibb00c69f96bf4bbc54776540c813e68f86598fc3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1058362
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095963Reviewed-by: Donn Denman <donnd@chromium.org>
Commit-Queue: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748464}

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

@@ -125,6 +125,11 @@ import java.util.concurrent.TimeoutException;
         "disable-features=" + ChromeFeatureList.CONTEXTUAL_SEARCH_ML_TAP_SUPPRESSION})
 @Restriction(RESTRICTION_TYPE_NON_LOW_END_DEVICE)
 @RetryOnFailure
+//
+// NOTE -- THIS WHOLE TEST CLASS IS TEMPORARILY DISABLED:
+//
+@DisabledTest(message = "See https://crbug.com/1058362")
+//
 public class ContextualSearchManagerTest {
     @Rule
     public ChromeActivityTestRule<ChromeActivity> mActivityTestRule =
@@ -142,7 +147,7 @@ public class ContextualSearchManagerTest {
     private static final String LOW_PRIORITY_INVALID_SEARCH_ENDPOINT = "/s/invalid";
     private static final String CONTEXTUAL_SEARCH_PREFETCH_PARAM = "&pf=c";
     // The number of ms to delay startup for all tests.
-    private static final int ACTIVITY_STARTUP_DELAY_MS = 5000; // TODO(donnd): reduce!
+    private static final int ACTIVITY_STARTUP_DELAY_MS = 1000;
 
     private ActivityMonitor mActivityMonitor;
     private ContextualSearchFakeServer mFakeServer;