Use Launcher aconfig flag in Resource file.

Use BaseIconRoot as an example. Also add bpfmt file formatting.

Bug: 393609690
Test: Verified compilation worked well and font actually built
successfully in both gradle and make.
Flag: com.android.launcher3.google_sans_flex_font

Change-Id: I2200d13a8d57e5d046a35226f08a751add937ca7
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 6948133..768ba65 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -1,8 +1,10 @@
 [Builtin Hooks]
 ktfmt = true
+bpfmt = true
 
 [Builtin Hooks Options]
 ktfmt = --kotlinlang-style
+bpfmt = -d
 
 [Tool Paths]
 ktfmt = ${REPO_ROOT}/external/ktfmt/ktfmt.sh