Revert "Disable Shrinking in L8 temporarily"

This reverts commit 6fc6ba8b8878218c3c1fdb6eb7229cf4f3b57908.

Reason for revert: bot failures (dependency)

Change-Id: I21980d6d07b59247bf81beee822a2448e72af1bc
diff --git a/src/main/java/com/android/tools/r8/L8Command.java b/src/main/java/com/android/tools/r8/L8Command.java
index 952c362..1373928 100644
--- a/src/main/java/com/android/tools/r8/L8Command.java
+++ b/src/main/java/com/android/tools/r8/L8Command.java
@@ -163,14 +163,8 @@
     }
 
     public boolean isShrinking() {
-      getReporter()
-          .warning(
-              new StringDiagnostic(
-                  "Shrinking of desugared library has been temporarily disabled due to known bugs"
-                      + " being fixed."));
-      return false;
       // Answers true if keep rules, even empty, are provided.
-      // return !proguardConfigStrings.isEmpty() || !proguardConfigFiles.isEmpty();
+      return !proguardConfigStrings.isEmpty() || !proguardConfigFiles.isEmpty();
     }
 
     @Override
@@ -204,7 +198,7 @@
     @Override
     void validate() {
       Reporter reporter = getReporter();
-      if (!hasDesugaredLibraryConfiguration()) {
+      if (!hasDesugaredLibraryConfiguration()){
         reporter.error("L8 requires a desugared library configuration");
       }
       if (getProgramConsumer() instanceof ClassFileConsumer) {