better docs

Author: silbinarywolf

examples/minimal/build.zig

@@ -34,6 +34,10 @@ pub fn build(b: *std.Build) void {
         // Add Java files
         // - If you have 'android:hasCode="false"' in your AndroidManifest.xml then no Java files are required
         //   see: https://developer.android.com/ndk/samples/sample_na
+        //
+        //   WARNING: If you do not provide Java files AND android:hasCode="false" isn't explicitly set, then you may get the following error on "adb install"
+        //      Scanning Failed.: Package /data/app/base.apk code is missing]
+        //
         // apk.addJavaSourceFile(.{ .file = b.path("android/src/X.java") });
         break :blk apk;
     };

src/androidbuild/apk.zig

@@ -207,7 +207,7 @@ fn doInstallApk(apk: *Apk) std.mem.Allocator.Error!*Step.InstallFile {
         // This validation rule has been removed because if you have `android:hasCode="false"` in your AndroidManifest.xml file
         // then you can have no Java files.
         //
-        // If you do not provide Java files AND hasCode=false isn't set, then you may get the following error on "adb install"
+        // If you do not provide Java files AND android:hasCode="false" isn't set, then you may get the following error on "adb install"
         // - Scanning Failed.: Package /data/app/base.apk code is missing]
         //
         // Ideally we may want to do something where we can utilize "aapt2 dump X" to determine if "hasCode" is set and if it isn't, throw