Re-enable all shrinking tests

- They were all failing due to internal use of ConcurrentHashMap
  static initialization.

Bug: 142377475
Change-Id: I53229b3d02ec9d0b2eef6b08b2b5ac0c8968b72c

src/test/java/com/android/tools/r8/desugar/corelib/CustomCollectionTest.java

diff --git a/src/test/java/com/android/tools/r8/desugar/corelib/CustomCollectionTest.java b/src/test/java/com/android/tools/r8/desugar/corelib/CustomCollectionTest.java
index 71cbfcd..54ab923 100644
--- a/src/test/java/com/android/tools/r8/desugar/corelib/CustomCollectionTest.java
+++ b/src/test/java/com/android/tools/r8/desugar/corelib/CustomCollectionTest.java
@@ -57,8 +57,6 @@
 
   @Test
   public void testCustomCollectionD8() throws Exception {
-    // TODO(b/142377475).
-    Assume.assumeTrue(!shrinkDesugaredLibrary);
     KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
     D8TestRunResult d8TestRunResult =
         testForD8()

src/test/java/com/android/tools/r8/desugar/corelib/corelibjdktests/Jdk11AtomicTests.java

diff --git a/src/test/java/com/android/tools/r8/desugar/corelib/corelibjdktests/Jdk11AtomicTests.java b/src/test/java/com/android/tools/r8/desugar/corelib/corelibjdktests/Jdk11AtomicTests.java
index 0010c65..b90e644 100644
--- a/src/test/java/com/android/tools/r8/desugar/corelib/corelibjdktests/Jdk11AtomicTests.java
+++ b/src/test/java/com/android/tools/r8/desugar/corelib/corelibjdktests/Jdk11AtomicTests.java
@@ -72,8 +72,6 @@
 
   @Test
   public void testD8AtomicReference() throws Exception {
-    // TODO(b/142377475).
-    Assume.assumeTrue(!shrinkDesugaredLibrary);
     KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
     String verbosity = "2";
     testForD8()
@@ -97,8 +95,6 @@
 
   @Test
   public void testD8AtomicUpdaters() throws Exception {
-    // TODO(b/142377475).
-    Assume.assumeTrue(!shrinkDesugaredLibrary);
     KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
     String verbosity = "2";
     testForD8()