Cleanup -assumenosideeffects rules which also assume values

The AppReduce team wants to simplify the implementation of -assumenosideeffects by removing the ability to also have the rule also work like an -assumevalues rule. This transforms existing rules into an -assumenosideeffects/-assumevalues pair. For example:

-assumenosideeffects class Foo { boolean foo() return false; }

will be transformed into:

-assumenosideeffects class Foo { boolean foo(); }
-assumevalues class Foo { boolean foo() return false; }

Tested:
    TAP sample presubmit queue
    http://test/OCL:249732401:BASE:249740180:1558654982282:a5b95487
PiperOrigin-RevId: 250415146
Change-Id: Ib0b6f2e1c91eac53bba8b49a826fa4d013287192
diff --git a/src/main/java/com/google/android/libraries/feed/buildtools/proguard/proguard_release.flags b/src/main/java/com/google/android/libraries/feed/buildtools/proguard/proguard_release.flags
index 5cd1bda..77470eb 100644
--- a/src/main/java/com/google/android/libraries/feed/buildtools/proguard/proguard_release.flags
+++ b/src/main/java/com/google/android/libraries/feed/buildtools/proguard/proguard_release.flags
@@ -3,8 +3,8 @@
 # should be avoided.
 
 -assumenosideeffects class com.google.android.libraries.feed.common.logging.Logger {
-  public static boolean isDebugEnabled(java.lang.String) return false;
-  public static boolean isVerboseEnabled(java.lang.String) return false;
+  public static boolean isDebugEnabled(java.lang.String);
+  public static boolean isVerboseEnabled(java.lang.String);
 
   public static void v(...);
   public static void vWithStackTrace(...);
@@ -14,5 +14,10 @@
   # Protocol buffers are large. Only allow spamming a developer's device.
   public static void debugLogRawProto(...);
 
+  private static boolean shouldWtfCrash();
+}
+-assumevalues class com.google.android.libraries.feed.common.logging.Logger {
+  public static boolean isDebugEnabled(java.lang.String) return false;
+  public static boolean isVerboseEnabled(java.lang.String) return false;
   private static boolean shouldWtfCrash() return false;
 }