Greylist test API for CtsSliceTestCases

The test invokes two hidden methods inside a ContentProvider.
Since we cannot exempt those, add the two methods to light greylist
until they are made @TestApi.

Bug: 64382372
Test: run cts --module CtsSliceTestCases
Change-Id: I9bc0c23282c1744f4b93b9d84fcdd022f70859c2
diff --git a/config/hiddenapi-light-greylist.txt b/config/hiddenapi-light-greylist.txt
index ba3c024..4d7fad4 100644
--- a/config/hiddenapi-light-greylist.txt
+++ b/config/hiddenapi-light-greylist.txt
@@ -374,6 +374,8 @@
 Landroid/app/SharedPreferencesImpl;-><init>(Ljava/io/File;I)V
 Landroid/app/SharedPreferencesImpl;->mFile:Ljava/io/File;
 Landroid/app/SharedPreferencesImpl;->startReloadIfChangedUnexpectedly()V
+Landroid/app/slice/Slice$Builder;-><init>(Landroid/net/Uri;)V
+Landroid/app/slice/Slice$Builder;->setSpec(Landroid/app/slice/SliceSpec;)Landroid/app/slice/Slice$Builder;
 Landroid/app/slice/SliceItem;->getTimestamp()J
 Landroid/app/slice/SliceManager;->bindSlice(Landroid/net/Uri;Ljava/util/List;)Landroid/app/slice/Slice;
 Landroid/app/slice/SliceManager;->pinSlice(Landroid/net/Uri;Ljava/util/List;)V