Revert "Disable all failing TabStripTest tests"

This reverts commit 011a35b6.

Reason for revert: These tests should be fixed with https://chromium-review.googlesource.com/c/chromium/src/+/2305374 

Original change's description:
> Disable all failing TabStripTest tests
> 
> Disable the following tests because they are failing on
> L/M Tablet Tester bots:
> 
> TabStripTest#testCloseAllIncognitoTabsFromTabMenu
> TabStripTest#testCloseLastIncognitoTab
> TabStripTest#testCloseTabWithManyTabs
> TabStripTest#testNewIncognitoTabFromMenuAtNormalStrip
> TabStripTest#testSwitchStripStackersWithIncognito
> TabStripTest#testTabSelectionViewDoesNotBreakModelSwitch
> TabStripTest#testToggleIncognitoMode
> 
> Note:
> TabStripTest#testSelectWithManyTabs was disabled in
> crbug.com/1107395.
> 
> BUG=1107543,1107395
> TBR=dtrainor@chromium.org
> 
> Change-Id: I638033bf1f9b12e009dfbd2ff8b2e2128d000373
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2308469
> Reviewed-by: Tim Volodine <timvolodine@chromium.org>
> Commit-Queue: Tim Volodine <timvolodine@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#790095}

TBR=dtrainor@chromium.org,timvolodine@chromium.org

Change-Id: I6ac4a86a451aa839672fed129e95b097ddcc7db9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1107543
Bug: 1107395
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2309750Reviewed-by: Mei Liang <meiliang@chromium.org>
Commit-Queue: Mei Liang <meiliang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790261}

chrome/android/javatests/src/org/chromium/chrome/browser/compositor/overlays/strip/TabStripTest.java

@@ -157,7 +157,6 @@ public class TabStripTest {
     @LargeTest
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
     @Feature({"TabStrip"})
-    @DisabledTest(message = "crbug.com/1107543")
     public void testNewIncognitoTabFromMenuAtNormalStrip() throws Exception {
         InstrumentationRegistry.getInstrumentation().waitForIdleSync();
         Assert.assertFalse("Expected normal strip to be selected",
@@ -256,7 +255,6 @@ public class TabStripTest {
     @LargeTest
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
     @Feature({"TabStrip"})
-    @DisabledTest(message = "crbug.com/1107543")
     public void testCloseTabWithManyTabs() throws Exception {
         ChromeTabUtils.newTabsFromMenu(
                 InstrumentationRegistry.getInstrumentation(), mActivityTestRule.getActivity(), 4);
@@ -393,7 +391,6 @@ public class TabStripTest {
     @LargeTest
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
     @Feature({"TabStrip"})
-    @DisabledTest(message = "crbug.com/1107543")
     public void testToggleIncognitoMode() throws Exception {
         InstrumentationRegistry.getInstrumentation().waitForIdleSync();
         Assert.assertFalse("Expected normal strip to be selected",
@@ -422,7 +419,6 @@ public class TabStripTest {
     @LargeTest
     @Feature({"TabStrip"})
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
-    @DisabledTest(message = "crbug.com/1107543")
     public void testCloseLastIncognitoTab() {
         InstrumentationRegistry.getInstrumentation().waitForIdleSync();
         Assert.assertFalse("Expected normal strip to be selected",
@@ -452,7 +448,6 @@ public class TabStripTest {
     @LargeTest
     @Feature({"TabStrip"})
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
-    @DisabledTest(message = "crbug.com/1107543")
     public void testCloseAllIncognitoTabsFromTabMenu() {
         //1. Create two incognito tabs
         InstrumentationRegistry.getInstrumentation().waitForIdleSync();
@@ -500,7 +495,6 @@ public class TabStripTest {
     @LargeTest
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
     @Feature({"TabStrip"})
-    @DisabledTest(message = "crbug.com/1107543")
     public void testTabSelectionViewDoesNotBreakModelSwitch() {
         InstrumentationRegistry.getInstrumentation().waitForIdleSync();
         Assert.assertFalse("Expected normal strip to be selected",
@@ -529,7 +523,6 @@ public class TabStripTest {
     @LargeTest
     @Restriction(UiRestriction.RESTRICTION_TYPE_TABLET)
     @Feature({"TabStrip"})
-    @DisabledTest(message = "crbug.com/1107543")
     public void testSwitchStripStackersWithIncognito() throws Exception {
         // Open an incognito tab to switch to the incognito model.
         mActivityTestRule.newIncognitoTabFromMenu();