Move AliasProvider to lib.analysis

This is part of splitting up the build-base library into separate libraries
for analysis, exec, and rules.

PiperOrigin-RevId: 164438390
diff --git a/src/main/java/com/google/devtools/build/lib/rules/Alias.java b/src/main/java/com/google/devtools/build/lib/rules/Alias.java
index e1bc205..652de64 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/Alias.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/Alias.java
@@ -18,6 +18,7 @@
 import static com.google.devtools.build.lib.packages.BuildType.LABEL;
 
 import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.analysis.AliasProvider;
 import com.google.devtools.build.lib.analysis.BaseRuleClasses;
 import com.google.devtools.build.lib.analysis.ConfiguredTarget;
 import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;