secret-store: Use simple API to manage secrets

Only Simple API is supposed to work in flatpak.  So let's use it
8 jobs for wip/sadiq/use-simple-secret-api in 3 minutes and 57 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #325027
librem5
build-debian-gcc-bullseye

00:01:58

failed #325026
librem5
build-debian-gcc-buster

00:02:03

 
  Test
skipped #325029
librem5
check-po
skipped #325028
librem5
test:debian-gcc
 
  Package
skipped #325030
librem5
package:deb-debian-buster
skipped #325031
librem5:arm64
package:deb-debian-buster:arm64
 
  Test Package
skipped #325032
librem5
autopkgtest-debian-buster-package
skipped #325033
librem5
lintian-debian-buster-package
 
Name Stage Failure
failed
build-debian-gcc-buster Build
              ^
cc1: all warnings being treated as errors
[25/82] Compiling C object 'src/25a6634@@chatty@sha/users_chatty-item.c.o'.
[26/82] Compiling C object 'src/25a6634@@chatty@sha/users_chatty-account.c.o'.
[27/82] Compiling C object 'src/25a6634@@chatty@sha/matrix_chatty-ma-chat.c.o'.
[28/82] Compiling C object 'src/25a6634@@chatty@sha/users_chatty-contact.c.o'.
[29/82] Compiling C object 'src/25a6634@@chatty@sha/users_chatty-pp-buddy.c.o'.
ninja: build stopped: subcommand failed.
ERROR: Job failed: exit code 1