Minor adjustments to Android port stubs

* src/androidfns.c (Fx_display_backing_store): Return
`when-mapped' in place of `always', since the former better
reflects Android port behavior.
(syms_of_androidfns) <always>: Delete defsym.
<when-mapped>: New defsym.

* src/term.c (Fsuspend_tty, Fresume_tty): Properly signal errors
on Android rather than quietly disregarding calls.
10 jobs for master in 130 minutes and 2 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Build Images
failed #73582
build-image-inotify

00:02:43

 
  Normal
skipped #73583
test-all-inotify
 
  Platform Images
failed #73584
build-image-eglot

00:02:44

passed #73586
build-image-gnustep

01:07:34

failed #73585
build-image-tree-sitter

00:02:43

 
  Platforms
skipped #73587
test-eglot
passed #73589
test-gnustep

00:02:35

skipped #73588
test-tree-sitter
 
  Native Comp Images
passed #73590
build-native-comp-speed2

01:14:51

 
  Native Comp
failed #73591
test-native-comp-speed2

00:55:05

 
Name Stage Failure
failed
test-native-comp-speed2 Native Comp
Uploading artifacts for failed job
Uploading artifacts...
test-native-comp-speed2-cf9353e2/: found 527 matching files and directories

Uploading artifacts as "archive" to coordinator... 201 Created
id=73591 responseStatus=201 Created token=YCh5U4Qs
Uploading artifacts...
test-native-comp-speed2-cf9353e2/junit-test-report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... 201 Created
id=73591 responseStatus=201 Created token=YCh5U4Qs
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 2

failed
build-image-eglot Platform Images
 > [internal] load build context:
------
rpc error: code = Unavailable desc = transport is closing
Running after script...
$ test -n "$(docker ps -aq -f name=${test_name})" && docker cp ${test_name}:checkout/test ${test_name}
$ test -n "$(docker ps -aq -f name=${test_name})" && docker rm ${test_name}
$ find ${test_name} ! \( -name "*.log" -o -name ${EMACS_TEST_JUNIT_REPORT} \) -type f -delete
find: build-image-eglot-cf9353e2: No such file or directory
ERROR: Job failed: exit code 1
failed
build-image-tree-sitter Platform Images
#5 [emacs-tree-sitter  2/11] RUN apt-get update &&     apt-get install -y -...
#5 CANCELED
context canceled
Running after script...
$ test -n "$(docker ps -aq -f name=${test_name})" && docker cp ${test_name}:checkout/test ${test_name}
$ test -n "$(docker ps -aq -f name=${test_name})" && docker rm ${test_name}
find: build-image-tree-sitter-cf9353e2: No such file or directory
$ find ${test_name} ! \( -name "*.log" -o -name ${EMACS_TEST_JUNIT_REPORT} \) -type f -delete
ERROR: Job failed: exit code 1
failed
build-image-inotify Build Images
rpc error: code = Canceled desc = grpc: the client connection is closing
Running after_script
Running after script...
$ test -n "$(docker ps -aq -f name=${test_name})" && docker cp ${test_name}:checkout/test ${test_name}
$ test -n "$(docker ps -aq -f name=${test_name})" && docker rm ${test_name}
$ find ${test_name} ! \( -name "*.log" -o -name ${EMACS_TEST_JUNIT_REPORT} \) -type f -delete
find: build-image-inotify-cf9353e2: No such file or directory
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1