Fuzz Widevine AIDL drmFactory binder interface.

[Merged from http://go/wvgerrit/152150 ]

Test: build and run test

Bug: 226948319
Change-Id: I717d119cbf455fe76e4bb1f818d00141f4e7fa7c

libwvdrmengine/aidl_src/fuzzer/README.md

@@ -0,0 +1,31 @@
+# About Widevine aidl binder fuzzer
+
+## Build the binaries
+
+See [go/build-fast][1] to setup the RBE environment.
+
+From Android root:
+
+1. source build/make/rbesetup.sh
+2. `SANITIZE_TARGET`=hwaddress m `android.hardware.drm-service.widevine.aidl_fuzzer` -j128
+
+## Push to target for testing
+
+adb push $(OUT)/data/fuzz/arm64/lib/ /data/fuzz/arm64/lib/
+
+## Run test
+
+adb shell<br>
+cd /data/fuzz/arm64<br>
+`LD_LIBRARY_PATH=/data/fuzz/arm65/lib /data/fuzz/arm64/android.hardware.drm-service.widevine.aidl_fuzzer/vendor/hw/android.hardware.drm-service.widevine.aidl_fuzzer`
+
+## Monitoring
+
+By using `cc_fuzz` in Android.bp, the fuzz binary and its dependency sanitized shared libraries will be installed on the device.<br>
+Libraries are installed in `/data/fuzz/<arch>/lib`, and the binary is installed in /data/fuzz/&ltarch&gt/&lt`binary_name`&gt/vendor/hw.<br>
+
+Within 24-48 hours of merge, you can monitor the coverage data [here][2].<br>
+Bugs will be filed automatically, and the owner of the fuzzer(the cc in the config section) will be notified.<br>
+
+[1]: https://g3doc.corp.google.com/company/teams/android/developing/update/build-fast.md?cl=head
+[2]: https://android-coverage.googleplex.com/