fix unknown argument: '-ffile-prefix-map by only build default target (…

…#9690)

src/android/CHIPTool/app/build.gradle

@@ -17,6 +17,12 @@ android {
  // NOTE: This build assumes CHIP was configured and built for armeabi-v7a. Deal with
  // other archs later when build is sane.
  // ndk {abiFilters 'armeabi-v7a'}
+
+ externalNativeBuild {
+ cmake {
+ targets "default"
+ }
+ }
  }
 
  buildTypes {