Set min_sdk_version to be part of mainline modules

Modules contributing mainline modules (APK/APEX) should set
min_sdk_version as well as apex_available.

For now setting min_sdk_version doesn't change build outputs.
But build-time checks will be added soon.

Bug: 152655956
Test: m
Merged-In: I2f739d776e40d4eb28fd29d3cd737b81ad2dd75a
Change-Id: I2f739d776e40d4eb28fd29d3cd737b81ad2dd75a
(cherry picked from commit e60c9f6757fa9401fef25584952dfbca3fe587a3)
diff --git a/Android.bp b/Android.bp
index a18bb8f..3ca94c0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -2,12 +2,14 @@
     name: "libFLAC-config",
     export_include_dirs: ["."],
     vendor_available: true,
+    min_sdk_version: "29",
 }
 
 cc_library_headers {
     name: "libFLAC-headers",
     export_include_dirs: ["include"],
     vendor_available: true,
+    min_sdk_version: "29",
 }
 
 subdirs = ["libFLAC"]
diff --git a/libFLAC/Android.bp b/libFLAC/Android.bp
index 1b9c7bd..4376ee2 100644
--- a/libFLAC/Android.bp
+++ b/libFLAC/Android.bp
@@ -57,4 +57,6 @@
         // cfi: true,
         blacklist: "libFLAC_blacklist.txt",
     },
+
+    min_sdk_version: "29",
 }