ANDROID: build: Clean up legacy generated files

The legacy build.sh build generates some files in source directories
which cause problems for Bazel. If a user has run a legacy build,
then tries to run a Bazel build, they will encounter an error. The
error occurs because Bazel (by design) cannot overwrite source files.

To avoid these errors, clean up these generated files prior to
starting the Bazel build.

Change-Id: Id2ea294b45588b56418063a1db95c13c71fed617
Signed-off-by: John Moon <quic_johmoo@quicinc.com>

build_with_bazel.py

@@ -4,6 +4,7 @@
 
 import argparse
 import errno
+import glob
 import logging
 import os
 import re
@@ -192,6 +193,21 @@ class BazelBuilder:
         logging.debug("using userspace cross toolchain %s", toolchain)
         return toolchain
 
+    def clean_legacy_generated_files(self):
+        """Clean generated files from legacy build to avoid conflicts with Bazel"""
+        for f in glob.glob("{}/msm-kernel/arch/arm64/configs/vendor/*-*_defconfig".format(self.workspace)):
+            os.remove(f)
+
+        f = os.path.join(self.workspace, "bootable", "bootloader", "edk2", "Conf", ".AutoGenIdFile.txt")
+        if os.path.exists(f):
+            os.remove(f)
+
+        for root, _, files in os.walk(os.path.join(self.workspace, "bootable")):
+            for f in files:
+                if f.endswith(".pyc"):
+                    os.remove(os.path.join(root, f))
+
+
     def bazel(
         self,
         bazel_subcommand,
@@ -258,6 +274,8 @@ class BazelBuilder:
             logging.error("no targets to build")
             sys.exit(1)
 
+        self.clean_legacy_generated_files()
+
         logging.info("Building %s targets...", CPU)
         self.build_targets(
             cross_targets_to_build,