Add a new system service for app search management.

This change adds appsearch-service to base system and media system.

Bug: 142567528
Test: atest cts/tests/appsearch/src/com/android/cts/appsearch/AppSearchManagerTest.java
Change-Id: I4c7b2a2fb7e58b6796a4e5f2034f70d0dc706e0f
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 6c9b26c..6a0c433 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -30,6 +30,7 @@
     apexd \
     appops \
     app_process \
+    appsearch-service \
     appwidget \
     atrace \
     audioserver \