Add adb devices parser

Add a parser of `adb device -l` output, to extract a list of devices
with their serial, state and model.

PR #3005 <https://github.com/Genymobile/scrcpy/pull/3005>

app/meson.build

@@ -1,6 +1,7 @@
 src = [
     'src/main.c',
     'src/adb/adb.c',
+    'src/adb/adb_device.c',
     'src/adb/adb_parser.c',
     'src/adb/adb_tunnel.c',
     'src/cli.c',
@@ -221,6 +222,7 @@ if get_option('buildtype') == 'debug'
     tests = [
         ['test_adb_parser', [
             'tests/test_adb_parser.c',
+            'src/adb/adb_device.c',
             'src/adb/adb_parser.c',
             'src/util/str.c',
             'src/util/strbuf.c',