Enable Error Prone to detect obscure bugs.

We've been writing many new framework-specific Error Prone checkers
to help detect obscure platform bugs, and this change starts enabling
those checkers for more packages across the platform.

Bug: 155703208
Test: manual
Exempt-From-Owner-Approval: trivial blueprint changes
Change-Id: I1db3412b0be40f6f78c68331ae01756887192071
diff --git a/packages/FusedLocation/Android.bp b/packages/FusedLocation/Android.bp
index 242caab..ada463a 100644
--- a/packages/FusedLocation/Android.bp
+++ b/packages/FusedLocation/Android.bp
@@ -14,6 +14,7 @@
 
 android_app {
     name: "FusedLocation",
+    defaults: ["platform_app_defaults"],
     srcs: ["src/**/*.java"],
     libs: ["com.android.location.provider"],
     platform_apis: true,
@@ -45,4 +46,4 @@
     platform_apis: true,
     certificate: "platform",
     test_suites: ["device-tests"]
-}
\ No newline at end of file
+}