Graduate Verify and VerifyException from Beta as requested here:

#2409

These have been essentially stable for 3.5 years.

RELNOTES=`Verify` and `VerifyException` are no longer `@Beta`

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175704709

Author: kevinb

android/guava/src/com/google/common/base/Verify.java

@@ -16,7 +16,6 @@
 
 import static com.google.common.base.Preconditions.format;
 
-import com.google.common.annotations.Beta;
 import com.google.common.annotations.GwtCompatible;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import javax.annotation.Nullable;
@@ -85,7 +84,6 @@
  *
  * @since 17.0
  */
-@Beta
 @GwtCompatible
 public final class Verify {
   /**

android/guava/src/com/google/common/base/VerifyException.java

@@ -14,7 +14,6 @@
 
 package com.google.common.base;
 
-import com.google.common.annotations.Beta;
 import com.google.common.annotations.GwtCompatible;
 import javax.annotation.Nullable;
 
@@ -25,7 +24,6 @@
  *
  * @since 17.0
  */
-@Beta
 @GwtCompatible
 public class VerifyException extends RuntimeException {
   /** Constructs a {@code VerifyException} with no message. */

guava/src/com/google/common/base/Verify.java

@@ -16,7 +16,6 @@
 
 import static com.google.common.base.Preconditions.format;
 
-import com.google.common.annotations.Beta;
 import com.google.common.annotations.GwtCompatible;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import javax.annotation.Nullable;
@@ -85,7 +84,6 @@
  *
  * @since 17.0
  */
-@Beta
 @GwtCompatible
 public final class Verify {
   /**

guava/src/com/google/common/base/VerifyException.java

@@ -14,7 +14,6 @@
 
 package com.google.common.base;
 
-import com.google.common.annotations.Beta;
 import com.google.common.annotations.GwtCompatible;
 import javax.annotation.Nullable;
 
@@ -25,7 +24,6 @@
  *
  * @since 17.0
  */
-@Beta
 @GwtCompatible
 public class VerifyException extends RuntimeException {
   /** Constructs a {@code VerifyException} with no message. */