Add @hide to the biometric interfaces

This change allows the framework to depend on biometric AIDL types, for
example: `android.hardware.biometrics.fingerprint.PointerContext`.

The dependency can be introduced with a `-java-source` target, for
example: `:android.hardware.biometrics.common-V3-java-source`.

The "@hide" annotation informs Metalava that these types are not a
public API (not part of the SDK).

Bug: 218388821
Test: m android.hardware.biometrics.common-update-api
Test: m android.hardware.biometrics.face-update-api
Test: m android.hardware.biometrics.fingerprint-update-api
Change-Id: Ib3327594c64dbb800b9d1744869ceb490d63e553
diff --git a/biometrics/common/util/Android.bp b/biometrics/common/util/Android.bp
index 918ef72..b990812 100644
--- a/biometrics/common/util/Android.bp
+++ b/biometrics/common/util/Android.bp
@@ -13,6 +13,6 @@
     shared_libs: [
         "libbase",
         "libbinder_ndk",
-        "android.hardware.biometrics.common-V2-ndk",
+        "android.hardware.biometrics.common-V3-ndk",
     ],
 }