ANDROID: Disable AF_RXRPC for allmodconfig.

AF_RXRPC imposes a 49 char limit on UTS_RELEASE, but building with

  BUILD_NUMBER=P12345678 bazel build //common:kernel_x86_64_allmodconfig --config=stamp

requires more than 49 chars in UTS_RELEASE. Hence, this module
is disabled for allmodconfig.

Bug: 273576197
Test: ABTD
Change-Id: Ife604db109f870eda2fdbc0668d6bd1f4e4e906e
Signed-off-by: Yifan Hong <elsk@google.com>

build.config.allmodconfig

@@ -10,6 +10,8 @@ function update_config() {
          -e RANDSTRUCT_NONE \
          -d RANDSTRUCT_FULL \
          -d RANDSTRUCT \
+         -d AF_RXRPC \
+         -d AFS_FS \
 
     (cd ${OUT_DIR} && \
      make O=${OUT_DIR} $archsubarch CROSS_COMPILE=${CROSS_COMPILE} ${TOOL_ARGS} ${MAKE_ARGS} olddefconfig)