Set min_sdk_version to 29

This dependency is needed for aconfig flagging, which should be
supported on all mainline modules.

Bug: 328444881
Test: m
Change-Id: Ic007afa22716b037c478763ec2680f759ae19ea6
diff --git a/Android.bp b/Android.bp
index 78b950e..b27b7b0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -52,5 +52,5 @@
     ],
     product_available: true,
     vendor_available: true,
-    min_sdk_version: "33",
+    min_sdk_version: "29",
 }