ANDROID: tests targets use pkg_install.

copy_to_dist_dir is deprecated; we are switching to using pkg_install.

The only visible UX change is that --dist_dir no longer works;
one must specify --destdir instead.

Bug: 331730853
Change-Id: Ieb15614c01107eb39a3529a6b9f74a76be43a054
Signed-off-by: HONG Yifan <elsk@google.com>

BUILD.bazel

@@ -2582,18 +2582,30 @@ pkg_zip(
     visibility = ["//visibility:public"],
 )
 
-copy_to_dist_dir(
-    name = "tests_zip_x86_64_dist",
-    data = [":tests_zip_x86_64"],
-    dist_dir = "out/tests_x86_64/dist",
-    flat = True,
+pkg_files(
+    name = "tests_zip_x86_64_files",
+    srcs = [":tests_zip_x86_64"],
+    strip_prefix = strip_prefix.files_only(),
+    visibility = ["//visibility:private"],
 )
 
-copy_to_dist_dir(
+pkg_install(
+    name = "tests_zip_x86_64_dist",
+    srcs = [":tests_zip_x86_64_files"],
+    destdir = "out/tests_x86_64/dist",
+)
+
+pkg_files(
+    name = "tests_zip_arm64_files",
+    srcs = [":tests_zip_arm64"],
+    strip_prefix = strip_prefix.files_only(),
+    visibility = ["//visibility:private"],
+)
+
+pkg_install(
     name = "tests_zip_arm64_dist",
-    data = [":tests_zip_arm64"],
-    dist_dir = "out/tests_arm64/dist",
-    flat = True,
+    srcs = [":tests_zip_arm64_files"],
+    destdir = "out/tests_arm64/dist",
 )
 
 _TEST_MAPPINGS = glob(["**/TEST_MAPPING"])