dump_modemlog: move all files to subdirectory

Since radioext has already moved to this folder, it doesn't make sense
for the base folder to be dump_modemlog. This change moves it to its
own subfolder so that we can also add more in the future.

Test: build and flash, trigger bugreport and check modem logs are there
Bug: 302435001
Change-Id: Ia83378074068526023f591d63b1e5ac4700b8103

modem/Android.bp

@@ -1,44 +0,0 @@
-package {
-    default_applicable_licenses: ["Android-Apache-2.0"],
-}
-
-sh_binary {
-    name: "dump_modem.sh",
-    src: "dump_modem.sh",
-    vendor: true,
-    sub_dir: "dump",
-}
-
-cc_defaults {
-    name: "dump_modemlog_defaults",
-    srcs: ["modem_log_dumper.cpp"],
-    local_include_dirs: ["include"],
-    shared_libs: ["liblog"],
-}
-
-cc_binary {
-    name: "dump_modemlog",
-    srcs: ["dump_modemlog.cpp"],
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-    shared_libs: [
-        "libbase",
-        "libdump",
-        "liblog",
-    ],
-    defaults: ["dump_modemlog_defaults"],
-    vendor: true,
-    relative_install_path: "dump",
-}
-
-cc_test {
-    name: "dump_modemlog_test",
-    srcs: ["test/*.cpp"],
-    defaults: ["dump_modemlog_defaults"],
-    local_include_dirs: ["test/include"],
-    static_libs: ["libgmock"],
-    vendor: true,
-}