Keep explicit Objects.requireNonNull checks

# Tell R8 that the following methods are check not null methods, and to

# replace invocations to them with a more concise nullness check that produces

# (slightly) less informative error messages

# (slightly) less informative error messages.

# Note that we omit such optimizations for `Objects.requireNonNull`, as such

# messages are explicit and surfaced in the framework across API boundaries.

-convertchecknotnull class com.google.common.base.Preconditions {

  ** checkNotNull(...);

}

-convertchecknotnull class java.util.Objects {

  ** requireNonNull(...);

}

-convertchecknotnull class kotlin.jvm.internal.Intrinsics {

  void checkNotNull(...);

  void checkExpressionValueIsNotNull(...);