Migrate dump_power.sh contents into cpp for improved speed

Bug: 299133307
Test: adb bugreport and check dumpstate_board.txt
Change-Id: Ied22b516844cb1d39a39fbbdee0b81a69c1d2e1c
Signed-off-by: Hiroshi Akiyama <hiroshiakiyama@google.com>

dumpstate/Android.bp

@@ -9,12 +9,21 @@ sh_binary {
     sub_dir: "dump",
 }
 
-sh_binary {
-    name: "dump_power.sh",
-    src: "dump_power.sh",
+cc_binary {
+    name: "dump_power",
+    srcs: ["dump_power.cpp"],
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+    ],
+    shared_libs: [
+        "libbase",
+        "libdump",
+        "libdumpstateutil",
+    ],
     vendor: true,
-    sub_dir: "dump",
-    init_rc: ["dump_power.rc"],
+    relative_install_path: "dump",
 }
 
 sh_binary {